Major architecture update: stable identity, component validation, media indexing, and protocol docs

Add baseline unit tests and fix home server normalization
Implement components + uploads flow and gateway-aligned payloads
2026-02-27 19:33:35 +03:00 · 2026-02-20 17:45:10 +03:00 · 2026-02-20 17:41:08 +03:00 · 2026-02-20 16:37:30 +03:00 · 2026-02-20 15:01:55 +03:00 · 2026-02-20 04:24:27 +03:00
42 changed files with 5139 additions and 1012 deletions
@@ -1,9 +0,0 @@
-.dockerignore
-Dockerfile
-build/
-.dart_tool/
-.git/
-.github/
-.gitignore
-.idea/
-.packages
@@ -1,3 +1,32 @@
-# https://dart.dev/guides/libraries/private-files
-# Created by `dart pub`
+# Dart
 .dart_tool/
+.packages
+
+# ObjectBox generated
+*.g.dart
+objectbox-model.json
+
+# Build
+build/
+
+# Environment
+.env
+.env.local
+
+# IDE
+.idea/
+.vscode/
+*.iml
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Conversation exports (local only)
+conversation_export/
+uploads/
+objectbox/
+objectbox.dll
+
+# AI
+.claude
@@ -0,0 +1,162 @@
+# Reliquary Server Architecture
+
+## 1. Overview
+Reliquary is a self-hosted chat server with:
+- JWT auth
+- ObjectBox persistence
+- WebSocket gateway fanout
+- Component-based messages
+- Decoupled upload pipeline (upload first, message commit anytime)
+
+## 2. Identity and Roles (Current)
+- `userId` is an immutable opaque identifier (host-independent).
+- `handle` is derived metadata: `@username@home`.
+- `ChatUser.roles` controls authorization (`admin`, `member`, etc.).
+- `GET /api/me` returns `roles` so the client can gate admin UI.
+
+### Runtime Config Split
+- `server.bind_host` + `server.bind_port`: where Relic listens locally.
+- `server.public_base_url`: canonical external URL used for identity/handles/cross-server metadata.
+- This avoids conflating local bind settings with public identity/routing.
+
+### First Admin Bootstrap
+- Config key: `server.first_setup` in `config.yaml`.
+- When `first_setup: true`, the first registered local user gets `admin`.
+- Later registrations remain `member`.
+
+## 3. Storage Model
+
+### 3.1 Entities
+- `ChatUser`: identity/profile/auth data.
+- `ChatChannel`: channel metadata.
+- `ChatMessage`: channel message, search text, and `componentsJson`.
+- `ChatFile`: canonical media object for:
+  - message attachments
+  - user avatar media
+  - server icon/banner media
+- `ServerSettings`: singleton row for mutable server presentation settings.
+
+### 3.2 ChatFile Fields (Important)
+- `attachmentId` (unique external ID; API-facing)
+- `originalFileName` (preserved filename metadata)
+- `storedFileName` (physical disk key)
+- `sha256`
+- `mimeType`, `sizeBytes`, `width`, `height`
+- `usageType`: `message | avatar | server_icon | server_banner`
+- `status`: `pending | ready | failed`
+
+## 4. Upload and Message Flow
+
+### 4.1 Recommended Client Flow (Implemented Server Contract)
+1. Client stages attachment in composer/component editor.
+2. Client calls `POST /api/uploads/init` to create pending upload.
+3. Client uploads bytes to `PUT /api/uploads/:uploadId`.
+4. Client sends `POST /api/messages` with components referencing `uploadId`/`attachmentId`.
+5. If upload completes after message create, server emits `message.updated`.
+
+### 4.2 Why This Flow
+- No chronological jumping for text.
+- Immediate local optimistic UI.
+- Progressive media readiness via gateway updates.
+- Server keeps authoritative metadata and storage consistency.
+
+## 5. API Surface
+
+### 5.0 Identity Contract
+- Registration returns:
+  - `userId` (opaque stable ID)
+  - `username`
+  - `handle` (computed, mutable as home host changes)
+- Cross-server join request now expects:
+  - `userId`
+  - `username`
+  - `homeServer`
+  - `timestamp`
+  - `signature` over `userId:timestamp`
+
+### 5.1 Uploads and Attachments
+- `POST /api/uploads/init` (auth)
+- `PUT /api/uploads/:uploadId` (auth)
+- `POST /api/uploads` (auth, legacy single-step compatibility)
+- `GET /attachments/:attachmentId` (public immutable media URL)
+- `GET /api/channels/:channelId/media` (auth, gallery index feed)
+
+### 5.2 Profile and Server Media
+- `PATCH /api/me` (auth): update profile text fields.
+- `PUT /api/me/avatar` (auth): bind uploaded media as avatar.
+- `GET /avatars/:userId` (public alias for current avatar).
+- `GET /icons/:serverId` (public alias for current server icon).
+- `GET /banners/:serverId` (public alias for current server banner).
+
+### 5.3 Server Settings
+- `GET /api/server/settings` (auth)
+- `PATCH /api/server/settings` (admin)
+- `PUT /api/server/icon` (admin)
+- `PUT /api/server/banner` (admin)
+
+## 6. Gateway Behavior
+- Existing events:
+  - `message.created`
+  - `message.updated`
+  - `message.deleted`
+- For upload-driven updates:
+  - A message can be created with media items in `uploading`.
+  - When upload becomes ready, server rewrites affected components and emits `message.updated`.
+
+## 7. Component Media Item Contract (Client)
+Each media item in a component should carry stable IDs and upload state:
+
+```json
+{
+  "itemId": "local_or_stable_id",
+  "source": "local_upload|external_url",
+  "uploadId": "pending_or_ready_attachment_id",
+  "attachmentId": "same_as_uploadId_when_known",
+  "status": "uploading|ready|failed",
+  "url": "/attachments/<attachmentId>",
+  "originalFileName": "image.png",
+  "mimeType": "image/webp",
+  "sizeBytes": 12345,
+  "width": 1280,
+  "height": 720,
+  "thumbHash": "optional"
+}
+```
+
+### 7.1 Validation Rules (Server)
+- Every component node must include:
+  - `id` (string)
+  - `type` (string)
+  - `typeVersion` (positive int)
+  - `data` (object)
+- Nested components are supported under `data.children` with depth/size limits.
+- Media item rules:
+  - `source=local_upload` => `attachmentId` required.
+  - `source=external_url` => valid `http/https` `url` required.
+- Invalid component payloads are rejected server-side.
+
+## 8. Client Implementation Notes
+
+### 8.1 Staging and Transform Choice
+On file pick/drop, choose transform mode before upload starts:
+- `Compressed WebP` (recommended default)
+- `WebP`
+- `Original`
+
+If user changes mode for a staged file:
+- cancel in-flight upload
+- reprocess
+- re-upload
+
+### 8.2 Metadata Trust
+Client may send metadata hints, but server metadata is canonical.
+Client should refresh with upload response values.
+
+### 8.3 Caching
+- `/attachments/:attachmentId`: immutable and long-cache.
+- `/avatars`, `/icons`, `/banners`: mutable aliases; revalidate frequently.
+
+## 9. AVIF and JPEG XL Policy
+- MVP default: WebP (best compatibility/perf tradeoff).
+- AVIF: optional client mode if target platform decode support is verified.
+- JPEG XL: defer for now due to uneven ecosystem support.
@@ -1,3 +0,0 @@
-## 1.0.0
-
- Initial version.
@@ -1,21 +0,0 @@
-# Use latest stable channel SDK.
-FROM dart:stable AS build
-
-# Resolve app dependencies.
-WORKDIR /app
-COPY pubspec.* ./
-RUN dart pub get
-
-# Copy app source code (except anything in .dockerignore) and AOT compile app.
-COPY . .
-RUN dart build cli --target bin/server.dart -o output
-
-# Build minimal serving image from AOT-compiled `/server`
-# and the pre-built AOT-runtime in the `/runtime/` directory of the base image.
-FROM scratch
-COPY --from=build /runtime/ /
-COPY --from=build /app/output/bundle/ /app/
-
-# Start server.
-EXPOSE 8080
-CMD ["/app/bin/server"]
@@ -0,0 +1,140 @@
+# Reliquary Protocol (MVP v1)
+
+This document defines the current wire contract used by the server.
+
+## 1. Identity
+- `userId`: immutable opaque ID.
+- `username`: home-server unique, mutable.
+- `handle`: derived string `@username@home`.
+- `homeServer`: canonical public base URL.
+
+## 2. Auth
+
+### `POST /auth/register`
+Request:
+```json
+{ "username": "alice", "password": "password123" }
+```
+Response fields include:
+- `token`
+- `userId`
+- `username`
+- `handle`
+- `publicKey`
+- encrypted key backup fields
+
+### `POST /auth/login`
+Request:
+```json
+{ "username": "alice", "password": "password123" }
+```
+Response includes token + profile/key fields.
+
+### `POST /auth/join`
+Request:
+```json
+{
+  "userId": "opaque_id",
+  "username": "alice",
+  "homeServer": "https://chat.example.com",
+  "timestamp": 1730000000,
+  "signature": "base64..."
+}
+```
+Signature is over `userId:timestamp`.
+
+## 3. Message Components
+
+Each component node must include:
+- `id` (string)
+- `type` (string)
+- `typeVersion` (positive int)
+- `data` (object)
+
+Optional:
+- `fallback`, `modifiers`
+
+Nested components are supported under `data.children`.
+
+## 4. Media Item Sources
+
+Media references support two sources:
+
+1. Local upload:
+```json
+{
+  "source": "local_upload",
+  "attachmentId": "att_...",
+  "status": "uploading|ready|failed"
+}
+```
+
+2. External URL:
+```json
+{
+  "source": "external_url",
+  "url": "https://example.com/image.jpg",
+  "status": "ready"
+}
+```
+
+Optional metadata snapshot:
+- `mimeType`, `sizeBytes`, `width`, `height`, `thumbHash`, `originalFileName`, `caption`.
+
+## 5. Uploads
+
+### `POST /api/uploads/init` (auth)
+Creates pending upload and returns `uploadId` (same ID namespace as attachment ID).
+
+### `PUT /api/uploads/:uploadId` (auth)
+Completes upload with file bytes and returns canonical metadata:
+- `attachmentId`, `url`, `status`, `mimeType`, `sizeBytes`, dimensions, hash.
+
+### `POST /api/uploads` (auth)
+Legacy single-step compatibility endpoint.
+
+### `GET /attachments/:attachmentId`
+Immutable media URL.
+
+## 6. Messages
+
+### `POST /api/messages` (auth)
+Request includes:
+- `channelId`
+- `components` or `componentsJson`
+- optional `content`
+
+Server behavior:
+- validates structure and media refs
+- normalizes media items
+- computes searchable `content`
+- persists `componentsJson`
+
+### `GET /api/messages?channelId=...`
+Returns message list with `componentsJson`.
+
+## 7. Gallery Index
+
+### `GET /api/channels/:channelId/media` (auth)
+Returns indexed media rows for grid views.
+
+Query params:
+- `limit` (default 50, max 100)
+- `before` cursor
+- `kind` (`image|video|file`)
+
+Each row includes:
+- linkage (`messageId`, `channelId`, `authorUserId`)
+- source (`attachmentId` or `externalUrl`)
+- display metadata (`mimeType`, dimensions, filename, etc.)
+
+## 8. Gateway
+
+WebSocket path: `/gateway`
+
+Message events:
+- `message.created`
+- `message.updated`
+- `message.deleted`
+
+Upload resolution can cause `message.updated`.
@@ -1,49 +1,47 @@
-A server app built using [Shelf](https://pub.dev/packages/shelf),
-configured to enable running with [Docker](https://www.docker.com/).
+# Chat Server

-This sample code handles HTTP GET requests to `/` and `/echo/<message>`
+A self-hosted Discord alternative with decentralized identity using the Home Server model.

-# Running the sample
+## Architecture

-## Running with the Dart SDK
+Each user has a **home server** where their identity lives (keypair), and can seamlessly join other **guest servers** using cryptographic signatures.

-You can run the example with the [Dart SDK](https://dart.dev/get-dart)
-like this:
+- **NO identity server** - just use one regular server as "home"
+- **NO federation protocol** - servers don't talk to each other
+- **Client does everything** - syncs, cross-server requests, profile updates

-```
-$ dart run bin/server.dart
-Server listening on port 8080
+See [ARCHITECTURE.md](./ARCHITECTURE.md) for full details.
+See [CLIENT_INTEGRATION.md](./CLIENT_INTEGRATION.md) for client protocol/API integration details.
+
+## Quick Start
+
+```bash
+# Install dependencies
+dart pub get
+
+# Generate ObjectBox code
+dart run build_runner build
+
+# Run server
+dart run lib/server.dart
 ```

-And then from a second terminal:
-```
-$ curl http://0.0.0.0:8080
-Hello, World!
-$ curl http://0.0.0.0:8080/echo/I_love_Dart
-I_love_Dart
-```
-
-## Running with Docker
-
-If you have [Docker Desktop](https://www.docker.com/get-started) installed, you
-can build and run with the `docker` command:
+## Project Structure

 ```
-$ docker build . -t myserver
-$ docker run -it -p 8080:8080 myserver
-Server listening on port 8080
+lib/
+├── server.dart              # Entry point, routes
+├── models.dart              # User, Channel, Message entities
+├── objectbox.g.dart         # Generated
+├── config/config.dart       # Server config
+└── src/
+    ├── auth/                # Keypair, JWT, middleware
+    ├── handlers/            # API endpoints
+    └── utils/               # Helpers
 ```

-And then from a second terminal:
-```
-$ curl http://0.0.0.0:8080
-Hello, World!
-$ curl http://0.0.0.0:8080/echo/I_love_Dart
-I_love_Dart
-```
+## Tech Stack

-You should see the logging printed in the first terminal:
-```
-2021-05-06T15:47:04.620417  0:00:00.000158 GET     [200] /
-2021-05-06T15:47:08.392928  0:00:00.001216 GET     [200] /echo/I_love_Dart
-```
+- **Framework**: Relic 1.0
+- **Database**: ObjectBox
+- **Auth**: JWT + ECDSA signatures
@@ -1,30 +0,0 @@
-# This file configures the static analysis results for your project (errors,
-# warnings, and lints).
-#
-# This enables the 'recommended' set of lints from `package:lints`.
-# This set helps identify many issues that may lead to problems when running
-# or consuming Dart code, and enforces writing Dart using a single, idiomatic
-# style and format.
-#
-# If you want a smaller set of lints you can change this to specify
-# 'package:lints/core.yaml'. These are just the most critical lints
-# (the recommended set includes the core lints).
-# The core lints are also what is used by pub.dev for scoring packages.
-
-include: package:lints/recommended.yaml
-
-# Uncomment the following section to specify additional rules.
-
-# linter:
-#   rules:
-#     - camel_case_types
-
-# analyzer:
-#   exclude:
-#     - path/to/excluded/files/**
-
-# For more information about the core and recommended set of lints, see
-# https://dart.dev/go/core-lints
-
-# For additional information about configuring this file, see
-# https://dart.dev/guides/language/analysis-options
@@ -1,59 +0,0 @@
-import 'package:chat_server/config/config.dart';
-import 'package:chat_server/models.dart';
-import 'package:chat_server/objectbox.g.dart';
-import 'package:chat_server/src/auth/auth_middleware.dart';
-import 'package:chat_server/src/handlers/auth_handlers.dart';
-import 'package:chat_server/src/handlers/channel_handlers.dart';
-import 'package:chat_server/src/handlers/debug_handlers.dart';
-import 'package:chat_server/src/handlers/message_handlers.dart';
-import 'package:chat_server/src/handlers/user_handlers.dart';
-import 'package:hotreloader/hotreloader.dart';
-import 'package:relic/relic.dart';
-
-// Global ObjectBox boxes
-final Store store = openStore();
-final Box<ChatUser> userBox = store.box<ChatUser>();
-final Box<ChatChannel> channelBox = store.box<ChatChannel>();
-final Box<ChatMessage> messageBox = store.box<ChatMessage>();
-
-RelicApp? _currentApp;
-
-Future<void> startServer() async {
-  await _currentApp?.close();
-
-  _currentApp = RelicApp()
-    // Public routes
-    ..post('/login', loginHandler)
-    ..post('/register', registerHandler)
-    // Debug routes
-    ..get('/debug/users', debugUsersHandler)
-    ..get('/debug/messages', debugMessagesHandler)
-    ..get('/debug/clear', debugClearHandler)
-    // Protected routes
-    ..use('/api', jwtMiddleware)
-    // Channels
-    ..get('/api/channels', getChannelsHandler)
-    ..post('/api/channels', createChannelHandler)
-    // Messages
-    ..get('/api/messages', getMessagesHandler)
-    ..post('/api/messages', sendMessageHandler)
-    // Users
-    ..get('/api/users', getUsersHandler)
-    // Logging & fallback
-    ..use('/', logRequests())
-    ..fallback = respondWith((_) => Response.notFound());
-
-  print('🚀 Server starting on http://localhost:${Config.port}');
-  await _currentApp!.serve(port: Config.port);
-}
-
-void main() async {
-  await HotReloader.create(
-    onAfterReload: (ctx) async {
-      print('🔄 Changes detected! Restarting server...');
-      await startServer();
-    },
-  );
-
-  await startServer();
-}
@@ -0,0 +1,79 @@
+{
+  "code": 200,
+  "data": {
+    "description": "Instead of SQL, you define your data model by annotating your persistent object types on the programming language level.",
+    "external": {
+      "alternate": {
+        "https://docs.objectbox.io/entity-annotations.md": {
+          "type": "text/markdown"
+        },
+        "https://docs.objectbox.io/entity-annotations/rss.xml": {
+          "title": "RSS Feed",
+          "type": "application/rss+xml"
+        }
+      },
+      "apple-touch-icon": {
+        "https://docs.objectbox.io/~gitbook/image?url=https%3A%2F%2F4174656640-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-legacy-files%2Fo%2Fspaces%252F-LETufmyus5LFkviJjr4%252Favatar.png%3Fgeneration%3D1528453316288221%26alt%3Dmedia&width=180&height=180&sign=96b28d45&sv=2": {
+          "media": "(prefers-color-scheme: dark)",
+          "type": "image/png"
+        }
+      },
+      "canonical": {
+        "https://docs.objectbox.io/entity-annotations": {}
+      },
+      "icon": {
+        "https://docs.objectbox.io/~gitbook/image?url=https%3A%2F%2F4174656640-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-legacy-files%2Fo%2Fspaces%252F-LETufmyus5LFkviJjr4%252Favatar.png%3Fgeneration%3D1528453316288221%26alt%3Dmedia&width=48&height=48&sign=96b28d45&sv=2": {
+          "media": "(prefers-color-scheme: dark)",
+          "type": "image/png"
+        }
+      },
+      "preconnect": {
+        "https://api.gitbook.com/cache/": {},
+        "https://ka-p.fontawesome.com/releases/v7.1.0/": {},
+        "https://static-2v.gitbook.com/": {
+          "crossorigin": ""
+        }
+      },
+      "preload": {
+        "https://static-2v.gitbook.com/_next/static/chunks/webpack-3f8d6b18f6ab2c58.js?dpl=59ffb95417795c0d96c480da62fd9440881efa4b": {
+          "as": "script",
+          "fetchpriority": "low"
+        }
+      },
+      "privacy-policy": {
+        "https://objectbox.io/wordpress/wp-content/uploads/2022/08/Object-Box-Privacy-Notice.pdf": {}
+      }
+    },
+    "html": "<html lang=\"en\" class=\"rounded-corners theme-clean no-tint sidebar-default sidebar-list-default links-default depth-subtle __variable_a32233 __variable_80f980 __variable_37a5dc font-Roboto sheet-open:gutter-stable hydrated light\" style=\"color-scheme: light; --toc-height: 1216px; --toc-top-offset: 64px; --outline-height: 1216px; --outline-top-offset: 64px;\"><head><meta charset=\"utf-8\"><link rel=\"preconnect\" href=\"https://static-2v.gitbook.com\" crossorigin=\"\"><link rel=\"preconnect\" href=\"https://api.gitbook.com/cache/\"><link rel=\"preconnect\" href=\"https://ka-p.fontawesome.com/releases/v7.1.0/\"><link rel=\"preconnect\" href=\"https://static-2v.gitbook.com\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1, maximum-scale=1, viewport-fit=cover\"><link rel=\"preload\" as=\"image\" fetchpriority=\"high\" 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+      "og:url": "https://docs.dartrelic.dev/getting-started/hello-world-example",
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+    },
+    "publishedTime": "Wed, 18 Feb 2026 09:05:14 GMT",
+    "title": "Hello world | Relic",
+    "url": "https://docs.dartrelic.dev/getting-started/hello-world-example",
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+}
@@ -1,9 +1,162 @@
+import 'dart:io';
+import 'dart:convert';
+import 'dart:math';
+
+import 'package:yaml/yaml.dart';
+
 class Config {
-  static const int port = 9870;
+  static late String bindHost;
+  static late int bindPort;
+  static late String publicBaseUrl;
+  static late String serverName;
+  static late String jwtSecret;
+  static late bool configured;
+  static late bool setupMode;
+  static late int bootstrapAdminLimit;
+  static late bool devDbTools;

-  // TODO: Move to environment variable in production
-  static const String jwtSecret = 'your_super_secret_key';
-
-  // Token expiration
  static const Duration tokenExpiry = Duration(days: 7);
+
+  static void initialize() {
+    final configFile = File('config.yaml');
+
+    if (!configFile.existsSync()) {
+      final generatedSecret = _generateJwtSecret();
+      configFile.writeAsStringSync(_defaultConfig(generatedSecret));
+      print('✅ Generated config.yaml (first run).');
+      print('⚠️ Review server.public_base_url and security.jwt_secret before production use.');
+    }
+
+    final yamlString = configFile.readAsStringSync();
+    final yamlMap = loadYaml(yamlString) as YamlMap;
+
+    final serverMap = yamlMap['server'] as YamlMap?;
+    final securityMap = yamlMap['security'] as YamlMap?;
+
+    serverName = (serverMap?['name'] as String?)?.trim() ?? '';
+    bindHost = (serverMap?['bind_host'] as String?)?.trim() ?? (serverMap?['host'] as String?)?.trim() ?? '127.0.0.1';
+    bindPort = (serverMap?['bind_port'] as int?) ?? (serverMap?['port'] as int?) ?? 9870;
+    final rawPublicBaseUrl =
+        (serverMap?['public_base_url'] as String?)?.trim() ?? _legacyPublicBaseUrlFromHost((serverMap?['host'] as String?)?.trim());
+    publicBaseUrl = _normalizePublicBaseUrl(rawPublicBaseUrl) ?? '';
+    configured = (serverMap?['configured'] as bool?) ?? false;
+    setupMode = (serverMap?['first_setup'] as bool?) ?? false;
+    bootstrapAdminLimit = (serverMap?['bootstrap_admin_limit'] as int?) ?? 1;
+    devDbTools = (serverMap?['dev_db_tools'] as bool?) ?? false;
+
+    jwtSecret = (securityMap?['jwt_secret'] as String?)?.trim() ?? '';
+
+    if (serverName.isEmpty) {
+      throw StateError('config.yaml: server.name is required.');
+    }
+    if (bindHost.isEmpty) {
+      throw StateError('config.yaml: server.bind_host is required.');
+    }
+    if (bindPort <= 0 || bindPort > 65535) {
+      throw StateError('config.yaml: server.bind_port must be between 1 and 65535.');
+    }
+    if (publicBaseUrl.isEmpty) {
+      throw StateError(
+        'config.yaml: server.public_base_url is required (example: https://chat.example.com).',
+      );
+    }
+    if (jwtSecret.isEmpty) {
+      throw StateError('config.yaml: security.jwt_secret is required.');
+    }
+    if (!configured) {
+      throw StateError(
+        'Server setup is not complete.\n'
+        'Edit config.yaml and set:\n'
+        '  server.configured: true\n'
+        'After reviewing server.public_base_url and security.jwt_secret.',
+      );
+    }
+    if (bootstrapAdminLimit < 0) {
+      throw StateError('config.yaml: server.bootstrap_admin_limit must be >= 0.');
+    }
+
+    print(
+      '🚀 Server Config Loaded: $serverName (bind=$bindHost:$bindPort, public=$publicBaseUrl, configured=$configured, setupMode=$setupMode, bootstrapAdminLimit=$bootstrapAdminLimit, devDbTools=$devDbTools)',
+    );
+  }
+
+  static String _generateJwtSecret() {
+    final random = Random.secure();
+    final bytes = List<int>.generate(32, (_) => random.nextInt(256));
+    return base64UrlEncode(bytes);
+  }
+
+  static String _defaultConfig(String generatedSecret) => '''
+# Reliquary Server Configuration
+server:
+  # Display name shown in clients
+  name: "Reliquary Server"
+
+  # Local bind address for the HTTP server
+  bind_host: "127.0.0.1"
+
+  # Local bind port for the HTTP server
+  bind_port: 9870
+
+  # Public base URL used for identity, handles, and cross-server references
+  # Dev example: http://localhost:9870
+  # Prod example: https://chat.example.com
+  public_base_url: "http://localhost:9870"
+
+  # Set to true after reviewing this file; server refuses to start while false
+  configured: false
+
+  # First local registration becomes admin
+  first_setup: true
+
+  # Number of local registrations auto-promoted to admin while first_setup=true
+  bootstrap_admin_limit: 1
+
+  # Testing-only DB admin/debug endpoints
+  dev_db_tools: true
+
+security:
+  # Auto-generated on first run; replace for production
+  jwt_secret: "$generatedSecret"
+''';
+
+  static String get publicHost {
+    final uri = Uri.tryParse(publicBaseUrl);
+    if (uri == null || uri.host.isEmpty) {
+      return publicBaseUrl;
+    }
+    return uri.hasPort ? '${uri.host}:${uri.port}' : uri.host;
+  }
+
+  static String? _normalizePublicBaseUrl(String? value) {
+    if (value == null || value.trim().isEmpty) {
+      return null;
+    }
+    final uri = Uri.tryParse(value.trim());
+    if (uri == null || uri.host.isEmpty) {
+      return null;
+    }
+    if (uri.scheme != 'http' && uri.scheme != 'https') {
+      return null;
+    }
+    return Uri(
+      scheme: uri.scheme,
+      host: uri.host,
+      port: uri.hasPort ? uri.port : null,
+    ).toString().replaceAll(RegExp(r'/$'), '');
+  }
+
+  static String? _legacyPublicBaseUrlFromHost(String? hostValue) {
+    if (hostValue == null || hostValue.trim().isEmpty) {
+      return null;
+    }
+    final host = hostValue.trim();
+    if (host.contains('://')) {
+      return host;
+    }
+    final lower = host.toLowerCase();
+    final isLocal = lower.startsWith('localhost') || lower.startsWith('127.') || lower.startsWith('[::1]');
+    final scheme = isLocal ? 'http' : 'https';
+    return '$scheme://$host';
+  }
 }
@@ -11,12 +11,12 @@ import 'package:objectbox/objectbox.dart';
 /// - isLocal = false
 /// - homeServer contains the URL of user's home
 /// - publicKey cached for verification
-@Entity()
-class User {
+@Entity(uid: 3848231140411393897)
+class ChatUser {
  @Id()
  int id = 0;

-  // Global identifier: "username@homeserver.com"
+  // Global immutable identifier (opaque, host-independent).
  @Unique()
  String userId;

@@ -28,7 +28,7 @@ class User {
  String? bio;

  // Identity
-  String publicKey; // Ed25519 public key, always stored
+  String publicKey; // ECDSA public key, always stored

  // HOME SERVER ONLY: Auth & key backup
  String? passwordHash;
@@ -48,7 +48,7 @@ class User {
  @Property(type: PropertyType.date)
  DateTime? lastSyncedAt; // When profile was last refreshed from home

-  User({
+  ChatUser({
    required this.userId,
    required this.username,
    required this.publicKey,
@@ -63,13 +63,13 @@ class User {
    List<String>? roles,
    DateTime? createdAt,
    DateTime? lastSyncedAt,
-  }) : roles = roles ?? ['member'],
-       createdAt = createdAt ?? DateTime.now(),
-       lastSyncedAt = lastSyncedAt;
+  })  : roles = roles ?? ['member'],
+        createdAt = createdAt ?? DateTime.now(),
+        lastSyncedAt = lastSyncedAt;
 }

-@Entity()
-class Channel {
+@Entity(uid: 2663861829934850300)
+class ChatChannel {
  @Id()
  int id = 0;

@@ -81,11 +81,15 @@ class Channel {
  @Property(type: PropertyType.date)
  DateTime createdAt;

-  Channel({required this.name, this.description, DateTime? createdAt}) : createdAt = createdAt ?? DateTime.now();
+  ChatChannel({
+    required this.name,
+    this.description,
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
 }

-@Entity()
-class Message {
+@Entity(uid: 2697867424319168785)
+class ChatMessage {
  @Id()
  int id = 0;

@@ -93,7 +97,7 @@ class Message {

  // Author info - includes enough for cross-server profile fetch
  int authorLocalId;
-  String authorUserId; // "alice@homeserver.com"
+  String authorUserId; // Immutable userId
  String? authorHomeServer; // for profile fetching

  // Cached for display (snapshot at message time)
@@ -101,6 +105,7 @@ class Message {
  String? authorAvatarUrl;

  String content;
+  String componentsJson;

  @Property(type: PropertyType.date)
  DateTime createdAt;
@@ -108,15 +113,132 @@ class Message {
  @Property(type: PropertyType.date)
  DateTime? editedAt;

-  Message({
+  ChatMessage({
    required this.channelId,
    required this.authorLocalId,
    required this.authorUserId,
    required this.authorUsername,
    required this.content,
+    required this.componentsJson,
    this.authorHomeServer,
    this.authorAvatarUrl,
    DateTime? createdAt,
    this.editedAt,
  }) : createdAt = createdAt ?? DateTime.now();
 }
+
+@Entity()
+class ChatFile {
+  @Id()
+  int id = 0;
+
+  @Unique()
+  String attachmentId;
+
+  int uploaderId;
+  String path;
+  String originalFileName;
+  String storedFileName;
+  String sha256;
+  String mimeType;
+  int width;
+  int height;
+  int sizeBytes;
+  bool isAttached;
+  String usageType; // message | avatar | server_icon | server_banner
+  String status; // pending | ready | failed
+  String? errorCode;
+
+  @Property(type: PropertyType.date)
+  DateTime createdAt;
+
+  ChatFile({
+    required this.attachmentId,
+    required this.uploaderId,
+    required this.path,
+    required this.originalFileName,
+    required this.storedFileName,
+    required this.sha256,
+    required this.mimeType,
+    required this.width,
+    required this.height,
+    required this.sizeBytes,
+    this.usageType = 'message',
+    this.status = 'pending',
+    this.isAttached = false,
+    this.errorCode,
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
+}
+
+@Entity()
+class ServerSettings {
+  @Id()
+  int id = 0;
+
+  @Unique()
+  String singletonKey;
+
+  String serverName;
+  String? description;
+  String? iconAttachmentId;
+  String? bannerAttachmentId;
+  String? updatedByUserId;
+
+  @Property(type: PropertyType.date)
+  DateTime updatedAt;
+
+  ServerSettings({
+    this.singletonKey = 'default',
+    required this.serverName,
+    this.description,
+    this.iconAttachmentId,
+    this.bannerAttachmentId,
+    this.updatedByUserId,
+    DateTime? updatedAt,
+  }) : updatedAt = updatedAt ?? DateTime.now();
+}
+
+@Entity()
+class ChatMessageMedia {
+  @Id()
+  int id = 0;
+
+  int messageId;
+  int channelId;
+  String authorUserId;
+
+  // local_upload
+  String? attachmentId;
+
+  // external_url
+  String? externalUrl;
+
+  // image | video | file
+  String kind;
+  String? mimeType;
+  String? originalFileName;
+  int? sizeBytes;
+  int? width;
+  int? height;
+  String? thumbHash;
+
+  @Property(type: PropertyType.date)
+  DateTime createdAt;
+
+  ChatMessageMedia({
+    required this.messageId,
+    required this.channelId,
+    required this.authorUserId,
+    required this.kind,
+    this.attachmentId,
+    this.externalUrl,
+    this.mimeType,
+    this.originalFileName,
+    this.sizeBytes,
+    this.width,
+    this.height,
+    this.thumbHash,
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
+}
@@ -1,136 +0,0 @@
-{
-  "_note1": "KEEP THIS FILE! Check it into a version control system (VCS) like git.",
-  "_note2": "ObjectBox manages crucial IDs for your object model. See docs for details.",
-  "_note3": "If you have VCS merge conflicts, you must resolve them according to ObjectBox docs.",
-  "entities": [
-    {
-      "id": "4:8789103914473960036",
-      "lastPropertyId": "4:1292940478834995143",
-      "name": "ChatChannel",
-      "properties": [
-        {
-          "id": "1:8326949064500635093",
-          "name": "id",
-          "type": 6,
-          "flags": 1
-        },
-        {
-          "id": "2:4261805573466490477",
-          "name": "name",
-          "indexId": "5:7489629953476729908",
-          "type": 9,
-          "flags": 2080
-        },
-        {
-          "id": "3:3159087232030070914",
-          "name": "description",
-          "type": 9
-        },
-        {
-          "id": "4:1292940478834995143",
-          "name": "createdAt",
-          "type": 10
-        }
-      ],
-      "relations": []
-    },
-    {
-      "id": "5:3737221321740284134",
-      "lastPropertyId": "5:9202752608552942529",
-      "name": "ChatMessage",
-      "properties": [
-        {
-          "id": "1:6937877991903739354",
-          "name": "id",
-          "type": 6,
-          "flags": 1
-        },
-        {
-          "id": "2:2320935452587221036",
-          "name": "content",
-          "type": 9
-        },
-        {
-          "id": "3:4252783758825304742",
-          "name": "senderId",
-          "indexId": "6:1080757755541990100",
-          "type": 6,
-          "flags": 8
-        },
-        {
-          "id": "4:3240604049002701987",
-          "name": "channelId",
-          "indexId": "7:2720778762517392200",
-          "type": 6,
-          "flags": 8
-        },
-        {
-          "id": "5:9202752608552942529",
-          "name": "createdAt",
-          "type": 10
-        }
-      ],
-      "relations": []
-    },
-    {
-      "id": "6:6808595317639142314",
-      "lastPropertyId": "4:3756250635467596289",
-      "name": "ChatUser",
-      "properties": [
-        {
-          "id": "1:5564900411312083069",
-          "name": "id",
-          "type": 6,
-          "flags": 1
-        },
-        {
-          "id": "2:3278062150453672411",
-          "name": "username",
-          "indexId": "8:3068871702763915304",
-          "type": 9,
-          "flags": 2048
-        },
-        {
-          "id": "3:7002102783671264440",
-          "name": "passwordHash",
-          "type": 9
-        },
-        {
-          "id": "4:3756250635467596289",
-          "name": "createdAt",
-          "type": 10
-        }
-      ],
-      "relations": []
-    }
-  ],
-  "lastEntityId": "6:6808595317639142314",
-  "lastIndexId": "8:3068871702763915304",
-  "lastRelationId": "0:0",
-  "lastSequenceId": "0:0",
-  "modelVersion": 5,
-  "modelVersionParserMinimum": 5,
-  "retiredEntityUids": [
-    240536022189472816,
-    8077011728318081304,
-    4705468874025958717
-  ],
-  "retiredIndexUids": [],
-  "retiredPropertyUids": [
-    8544617182402792569,
-    6117431287454466914,
-    5437786674528658195,
-    6072852454810870218,
-    2542181165384894966,
-    864989412971989074,
-    8028710060941408150,
-    1587682278007620331,
-    4383284664306084614,
-    8714147817359246506,
-    7393508199779059949,
-    3791306853268708842,
-    6999720138118727677
-  ],
-  "retiredRelationUids": [],
-  "version": 1
-}
@@ -1,418 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-// This code was generated by ObjectBox. To update it run the generator again
-// with `dart run build_runner build`.
-// See also https://docs.objectbox.io/getting-started#generate-objectbox-code
-
-// ignore_for_file: camel_case_types, depend_on_referenced_packages
-// coverage:ignore-file
-
-import 'dart:typed_data';
-
-import 'package:flat_buffers/flat_buffers.dart' as fb;
-import 'package:objectbox/internal.dart'
-    as obx_int; // generated code can access "internal" functionality
-import 'package:objectbox/objectbox.dart' as obx;
-
-import 'models.dart';
-
-export 'package:objectbox/objectbox.dart'; // so that callers only have to import this file
-
-final _entities = <obx_int.ModelEntity>[
-  obx_int.ModelEntity(
-    id: const obx_int.IdUid(4, 8789103914473960036),
-    name: 'ChatChannel',
-    lastPropertyId: const obx_int.IdUid(4, 1292940478834995143),
-    flags: 0,
-    properties: <obx_int.ModelProperty>[
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(1, 8326949064500635093),
-        name: 'id',
-        type: 6,
-        flags: 1,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(2, 4261805573466490477),
-        name: 'name',
-        type: 9,
-        flags: 2080,
-        indexId: const obx_int.IdUid(5, 7489629953476729908),
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(3, 3159087232030070914),
-        name: 'description',
-        type: 9,
-        flags: 0,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(4, 1292940478834995143),
-        name: 'createdAt',
-        type: 10,
-        flags: 0,
-      ),
-    ],
-    relations: <obx_int.ModelRelation>[],
-    backlinks: <obx_int.ModelBacklink>[],
-  ),
-  obx_int.ModelEntity(
-    id: const obx_int.IdUid(5, 3737221321740284134),
-    name: 'ChatMessage',
-    lastPropertyId: const obx_int.IdUid(5, 9202752608552942529),
-    flags: 0,
-    properties: <obx_int.ModelProperty>[
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(1, 6937877991903739354),
-        name: 'id',
-        type: 6,
-        flags: 1,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(2, 2320935452587221036),
-        name: 'content',
-        type: 9,
-        flags: 0,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(3, 4252783758825304742),
-        name: 'senderId',
-        type: 6,
-        flags: 8,
-        indexId: const obx_int.IdUid(6, 1080757755541990100),
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(4, 3240604049002701987),
-        name: 'channelId',
-        type: 6,
-        flags: 8,
-        indexId: const obx_int.IdUid(7, 2720778762517392200),
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(5, 9202752608552942529),
-        name: 'createdAt',
-        type: 10,
-        flags: 0,
-      ),
-    ],
-    relations: <obx_int.ModelRelation>[],
-    backlinks: <obx_int.ModelBacklink>[],
-  ),
-  obx_int.ModelEntity(
-    id: const obx_int.IdUid(6, 6808595317639142314),
-    name: 'ChatUser',
-    lastPropertyId: const obx_int.IdUid(4, 3756250635467596289),
-    flags: 0,
-    properties: <obx_int.ModelProperty>[
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(1, 5564900411312083069),
-        name: 'id',
-        type: 6,
-        flags: 1,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(2, 3278062150453672411),
-        name: 'username',
-        type: 9,
-        flags: 2048,
-        indexId: const obx_int.IdUid(8, 3068871702763915304),
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(3, 7002102783671264440),
-        name: 'passwordHash',
-        type: 9,
-        flags: 0,
-      ),
-      obx_int.ModelProperty(
-        id: const obx_int.IdUid(4, 3756250635467596289),
-        name: 'createdAt',
-        type: 10,
-        flags: 0,
-      ),
-    ],
-    relations: <obx_int.ModelRelation>[],
-    backlinks: <obx_int.ModelBacklink>[],
-  ),
-];
-
-/// Shortcut for [obx.Store.new] that passes [getObjectBoxModel] and for Flutter
-/// apps by default a [directory] using `defaultStoreDirectory()` from the
-/// ObjectBox Flutter library.
-///
-/// Note: for desktop apps it is recommended to specify a unique [directory].
-///
-/// See [obx.Store.new] for an explanation of all parameters.
-///
-/// For Flutter apps, also calls `loadObjectBoxLibraryAndroidCompat()` from
-/// the ObjectBox Flutter library to fix loading the native ObjectBox library
-/// on Android 6 and older.
-obx.Store openStore({
-  String? directory,
-  int? maxDBSizeInKB,
-  int? maxDataSizeInKB,
-  int? fileMode,
-  int? maxReaders,
-  bool queriesCaseSensitiveDefault = true,
-  String? macosApplicationGroup,
-}) {
-  return obx.Store(
-    getObjectBoxModel(),
-    directory: directory,
-    maxDBSizeInKB: maxDBSizeInKB,
-    maxDataSizeInKB: maxDataSizeInKB,
-    fileMode: fileMode,
-    maxReaders: maxReaders,
-    queriesCaseSensitiveDefault: queriesCaseSensitiveDefault,
-    macosApplicationGroup: macosApplicationGroup,
-  );
-}
-
-/// Returns the ObjectBox model definition for this project for use with
-/// [obx.Store.new].
-obx_int.ModelDefinition getObjectBoxModel() {
-  final model = obx_int.ModelInfo(
-    // If this version is not found, it means that this file was generated
-    // with an older version of the ObjectBox Dart generator.
-    // Please regenerate this file with the current generator version.
-    // Typically, this is done with `dart run build_runner build`.
-    generatorVersion: obx_int.GeneratorVersion.v2025_12_16,
-    entities: _entities,
-    lastEntityId: const obx_int.IdUid(6, 6808595317639142314),
-    lastIndexId: const obx_int.IdUid(8, 3068871702763915304),
-    lastRelationId: const obx_int.IdUid(0, 0),
-    lastSequenceId: const obx_int.IdUid(0, 0),
-    retiredEntityUids: const [
-      240536022189472816,
-      8077011728318081304,
-      4705468874025958717,
-    ],
-    retiredIndexUids: const [],
-    retiredPropertyUids: const [
-      8544617182402792569,
-      6117431287454466914,
-      5437786674528658195,
-      6072852454810870218,
-      2542181165384894966,
-      864989412971989074,
-      8028710060941408150,
-      1587682278007620331,
-      4383284664306084614,
-      8714147817359246506,
-      7393508199779059949,
-      3791306853268708842,
-      6999720138118727677,
-    ],
-    retiredRelationUids: const [],
-    modelVersion: 5,
-    modelVersionParserMinimum: 5,
-    version: 1,
-  );
-
-  final bindings = <Type, obx_int.EntityDefinition>{
-    ChatChannel: obx_int.EntityDefinition<ChatChannel>(
-      model: _entities[0],
-      toOneRelations: (ChatChannel object) => [],
-      toManyRelations: (ChatChannel object) => {},
-      getId: (ChatChannel object) => object.id,
-      setId: (ChatChannel object, int id) {
-        object.id = id;
-      },
-      objectToFB: (ChatChannel object, fb.Builder fbb) {
-        final nameOffset = fbb.writeString(object.name);
-        final descriptionOffset = object.description == null
-            ? null
-            : fbb.writeString(object.description!);
-        fbb.startTable(5);
-        fbb.addInt64(0, object.id);
-        fbb.addOffset(1, nameOffset);
-        fbb.addOffset(2, descriptionOffset);
-        fbb.addInt64(3, object.createdAt.millisecondsSinceEpoch);
-        fbb.finish(fbb.endTable());
-        return object.id;
-      },
-      objectFromFB: (obx.Store store, ByteData fbData) {
-        final buffer = fb.BufferContext(fbData);
-        final rootOffset = buffer.derefObject(0);
-        final nameParam = const fb.StringReader(
-          asciiOptimization: true,
-        ).vTableGet(buffer, rootOffset, 6, '');
-        final descriptionParam = const fb.StringReader(
-          asciiOptimization: true,
-        ).vTableGetNullable(buffer, rootOffset, 8);
-        final createdAtParam = DateTime.fromMillisecondsSinceEpoch(
-          const fb.Int64Reader().vTableGet(buffer, rootOffset, 10, 0),
-        );
-        final object = ChatChannel(
-          name: nameParam,
-          description: descriptionParam,
-          createdAt: createdAtParam,
-        )..id = const fb.Int64Reader().vTableGet(buffer, rootOffset, 4, 0);
-
-        return object;
-      },
-    ),
-    ChatMessage: obx_int.EntityDefinition<ChatMessage>(
-      model: _entities[1],
-      toOneRelations: (ChatMessage object) => [],
-      toManyRelations: (ChatMessage object) => {},
-      getId: (ChatMessage object) => object.id,
-      setId: (ChatMessage object, int id) {
-        object.id = id;
-      },
-      objectToFB: (ChatMessage object, fb.Builder fbb) {
-        final contentOffset = fbb.writeString(object.content);
-        fbb.startTable(6);
-        fbb.addInt64(0, object.id);
-        fbb.addOffset(1, contentOffset);
-        fbb.addInt64(2, object.senderId);
-        fbb.addInt64(3, object.channelId);
-        fbb.addInt64(4, object.createdAt.millisecondsSinceEpoch);
-        fbb.finish(fbb.endTable());
-        return object.id;
-      },
-      objectFromFB: (obx.Store store, ByteData fbData) {
-        final buffer = fb.BufferContext(fbData);
-        final rootOffset = buffer.derefObject(0);
-        final contentParam = const fb.StringReader(
-          asciiOptimization: true,
-        ).vTableGet(buffer, rootOffset, 6, '');
-        final senderIdParam = const fb.Int64Reader().vTableGet(
-          buffer,
-          rootOffset,
-          8,
-          0,
-        );
-        final channelIdParam = const fb.Int64Reader().vTableGet(
-          buffer,
-          rootOffset,
-          10,
-          0,
-        );
-        final createdAtParam = DateTime.fromMillisecondsSinceEpoch(
-          const fb.Int64Reader().vTableGet(buffer, rootOffset, 12, 0),
-        );
-        final object = ChatMessage(
-          content: contentParam,
-          senderId: senderIdParam,
-          channelId: channelIdParam,
-          createdAt: createdAtParam,
-        )..id = const fb.Int64Reader().vTableGet(buffer, rootOffset, 4, 0);
-
-        return object;
-      },
-    ),
-    ChatUser: obx_int.EntityDefinition<ChatUser>(
-      model: _entities[2],
-      toOneRelations: (ChatUser object) => [],
-      toManyRelations: (ChatUser object) => {},
-      getId: (ChatUser object) => object.id,
-      setId: (ChatUser object, int id) {
-        object.id = id;
-      },
-      objectToFB: (ChatUser object, fb.Builder fbb) {
-        final usernameOffset = fbb.writeString(object.username);
-        final passwordHashOffset = fbb.writeString(object.passwordHash);
-        fbb.startTable(5);
-        fbb.addInt64(0, object.id);
-        fbb.addOffset(1, usernameOffset);
-        fbb.addOffset(2, passwordHashOffset);
-        fbb.addInt64(3, object.createdAt.millisecondsSinceEpoch);
-        fbb.finish(fbb.endTable());
-        return object.id;
-      },
-      objectFromFB: (obx.Store store, ByteData fbData) {
-        final buffer = fb.BufferContext(fbData);
-        final rootOffset = buffer.derefObject(0);
-        final usernameParam = const fb.StringReader(
-          asciiOptimization: true,
-        ).vTableGet(buffer, rootOffset, 6, '');
-        final passwordHashParam = const fb.StringReader(
-          asciiOptimization: true,
-        ).vTableGet(buffer, rootOffset, 8, '');
-        final createdAtParam = DateTime.fromMillisecondsSinceEpoch(
-          const fb.Int64Reader().vTableGet(buffer, rootOffset, 10, 0),
-        );
-        final object = ChatUser(
-          username: usernameParam,
-          passwordHash: passwordHashParam,
-          createdAt: createdAtParam,
-        )..id = const fb.Int64Reader().vTableGet(buffer, rootOffset, 4, 0);
-
-        return object;
-      },
-    ),
-  };
-
-  return obx_int.ModelDefinition(model, bindings);
-}
-
-/// [ChatChannel] entity fields to define ObjectBox queries.
-class ChatChannel_ {
-  /// See [ChatChannel.id].
-  static final id = obx.QueryIntegerProperty<ChatChannel>(
-    _entities[0].properties[0],
-  );
-
-  /// See [ChatChannel.name].
-  static final name = obx.QueryStringProperty<ChatChannel>(
-    _entities[0].properties[1],
-  );
-
-  /// See [ChatChannel.description].
-  static final description = obx.QueryStringProperty<ChatChannel>(
-    _entities[0].properties[2],
-  );
-
-  /// See [ChatChannel.createdAt].
-  static final createdAt = obx.QueryDateProperty<ChatChannel>(
-    _entities[0].properties[3],
-  );
-}
-
-/// [ChatMessage] entity fields to define ObjectBox queries.
-class ChatMessage_ {
-  /// See [ChatMessage.id].
-  static final id = obx.QueryIntegerProperty<ChatMessage>(
-    _entities[1].properties[0],
-  );
-
-  /// See [ChatMessage.content].
-  static final content = obx.QueryStringProperty<ChatMessage>(
-    _entities[1].properties[1],
-  );
-
-  /// See [ChatMessage.senderId].
-  static final senderId = obx.QueryIntegerProperty<ChatMessage>(
-    _entities[1].properties[2],
-  );
-
-  /// See [ChatMessage.channelId].
-  static final channelId = obx.QueryIntegerProperty<ChatMessage>(
-    _entities[1].properties[3],
-  );
-
-  /// See [ChatMessage.createdAt].
-  static final createdAt = obx.QueryDateProperty<ChatMessage>(
-    _entities[1].properties[4],
-  );
-}
-
-/// [ChatUser] entity fields to define ObjectBox queries.
-class ChatUser_ {
-  /// See [ChatUser.id].
-  static final id = obx.QueryIntegerProperty<ChatUser>(
-    _entities[2].properties[0],
-  );
-
-  /// See [ChatUser.username].
-  static final username = obx.QueryStringProperty<ChatUser>(
-    _entities[2].properties[1],
-  );
-
-  /// See [ChatUser.passwordHash].
-  static final passwordHash = obx.QueryStringProperty<ChatUser>(
-    _entities[2].properties[2],
-  );
-
-  /// See [ChatUser.createdAt].
-  static final createdAt = obx.QueryDateProperty<ChatUser>(
-    _entities[2].properties[3],
-  );
-}
@@ -0,0 +1,105 @@
+import 'dart:io';
+
+import 'package:relic/relic.dart';
+
+import 'config/config.dart';
+import 'src/auth/auth_middleware.dart';
+import 'src/gateway/gateway_handlers.dart';
+import 'src/handlers/auth_handlers.dart';
+import 'src/handlers/channel_handlers.dart';
+import 'src/handlers/dev_db_handlers.dart';
+import 'src/handlers/message_handlers.dart';
+import 'src/handlers/public_handlers.dart';
+import 'src/handlers/settings_handlers.dart';
+import 'src/handlers/upload_handlers.dart';
+import 'src/state/app_state.dart';
+
+RelicApp? _currentApp;
+
+Future<void> startServer() async {
+  await _currentApp?.close();
+
+  _currentApp = RelicApp()
+    // ============ PUBLIC ENDPOINTS (no auth) ============
+
+    // Auth
+    ..post('/auth/register', registerHandler)
+    ..post('/auth/login', loginHandler)
+    ..post('/auth/join', joinServerHandler)
+
+    // Public identity verification (for cross-server)
+    ..get('/.well-known/users/:username', publicUserHandler)
+    ..get('/.well-known/verify/:userId', publicVerifyHandler)
+    ..get('/.well-known/server', publicServerInfoHandler)
+    ..get('/uploads/:fileName', getUploadFileHandler)
+    ..get('/attachments/:attachmentId', getAttachmentHandler)
+    ..get('/avatars/:userId', getAvatarAliasHandler)
+    ..get('/icons/:serverId', getServerIconAliasHandler)
+    ..get('/banners/:serverId', getServerBannerAliasHandler)
+    ..get('/gateway', gatewayHandler)
+
+    // ============ PROTECTED ENDPOINTS (requires auth) ============
+    ..use('/api', jwtMiddleware)
+
+    // Current user
+    ..get('/api/me', getMeHandler)
+    ..patch('/api/me', updateProfileHandler)
+    ..put('/api/me/avatar', setAvatarHandler)
+
+    // Server settings
+    ..get('/api/server/settings', getServerSettingsHandler)
+    ..patch('/api/server/settings', patchServerSettingsHandler)
+    ..put('/api/server/icon', setServerIconHandler)
+    ..put('/api/server/banner', setServerBannerHandler)
+
+    // Dev DB tools (testing only, admin only, requires config flag)
+    ..get('/api/dev/db/snapshot', getDevDbSnapshotHandler)
+    ..post('/api/dev/db/reset', resetDevDbHandler)
+    ..post('/api/dev/users/promote-admin', promoteUserToAdminHandler)
+    ..post('/api/dev/users/demote-admin', demoteUserFromAdminHandler)
+
+    // Channels
+    ..get('/api/channels', getChannelsHandler)
+    ..post('/api/channels', createChannelHandler)
+    ..get('/api/channels/:channelId', getChannelHandler)
+
+    // Messages
+    ..get('/api/messages', getMessagesHandler)
+    ..get('/api/channels/:channelId/media', getChannelMediaHandler)
+    ..post('/api/uploads/init', initUploadHandler)
+    ..put('/api/uploads/:uploadId', completeUploadHandler)
+    ..post('/api/uploads', uploadFileHandler)
+    ..post('/api/messages', sendMessageHandler)
+    ..put('/api/messages/:messageId', editMessageHandler)
+    ..delete('/api/messages/:messageId', deleteMessageHandler)
+
+    // ============ LOGGING & FALLBACK ============
+    ..use('/', logRequests())
+    ..fallback = respondWith((_) => Response.notFound());
+
+  print('');
+  print('🚀 Server starting...');
+  print('Bind: ${'${Config.bindHost}:${Config.bindPort}'.padRight(34)}');
+  print('Public URL: ${Config.publicBaseUrl.padRight(26)}');
+  print('');
+
+  final bindAddress = InternetAddress.tryParse(Config.bindHost) ?? (await InternetAddress.lookup(Config.bindHost)).first;
+
+  await _currentApp!.serve(
+    address: bindAddress,
+    port: Config.bindPort,
+  );
+}
+
+Future<void> stopServer() async {
+  await _currentApp?.close();
+  _currentApp = null;
+}
+
+void main() async {
+  Config.initialize();
+
+  initializeStore();
+
+  await startServer();
+}
@@ -1,10 +1,10 @@
-import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
 import 'package:relic/relic.dart';

-import '../../config/config.dart';
+import 'crypto_service.dart';

 final userIdProperty = ContextProperty<String>('userId');
 final usernameProperty = ContextProperty<String>('username');
+final userLocalIdProperty = ContextProperty<int>('userLocalId');

 /// JWT authentication middleware
 final jwtMiddleware = createMiddleware(
@@ -12,23 +12,32 @@ final jwtMiddleware = createMiddleware(
    final authHeader = request.headers.authorization;

    if (authHeader is! BearerAuthorizationHeader) {
-      return Response.unauthorized(body: Body.fromString('Bearer token required'));
+      return Response.unauthorized(
+        body: Body.fromString('Bearer token required'),
+      );
    }

-    try {
-      final jwt = JWT.verify(authHeader.token, SecretKey(Config.jwtSecret));
-
-      final userId = jwt.payload['sub'] as String? ?? jwt.payload['id'] as String;
-      final username = jwt.payload['username'] as String?;
-
-      userIdProperty[request] = userId;
-      if (username != null) {
-        usernameProperty[request] = username;
-      }
-
-      return null;
-    } catch (e) {
-      return Response.forbidden(body: Body.fromString('Invalid or expired token'));
+    final payload = AuthService.verifyToken(authHeader.token);
+    if (payload == null) {
+      return Response.forbidden(
+        body: Body.fromString('Invalid or expired token'),
+      );
    }
+
+    final userId = payload['sub'] as String?;
+    final username = payload['username'] as String?;
+
+    if (userId == null) {
+      return Response.forbidden(
+        body: Body.fromString('Invalid token payload'),
+      );
+    }
+
+    userIdProperty[request] = userId;
+    if (username != null) {
+      usernameProperty[request] = username;
+    }
+
+    return null; // Continue to handler
  },
 );
@@ -1,34 +0,0 @@
-import 'package:bcrypt/bcrypt.dart';
-import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
-
-import '../../config/config.dart';
-
-class AuthService {
-  /// Generates a JWT token for a user
-  static String generateToken(String userId, {String? username}) {
-    final payload = {'sub': userId, 'username': ?username};
-
-    final jwt = JWT(payload);
-    return jwt.sign(SecretKey(Config.jwtSecret), expiresIn: Config.tokenExpiry);
-  }
-
-  /// Verifies a password against a bcrypt hash
-  static bool verifyPassword(String password, String hash) {
-    return BCrypt.checkpw(password, hash);
-  }
-
-  /// Hashes a password using bcrypt
-  static String hashPassword(String password) {
-    return BCrypt.hashpw(password, BCrypt.gensalt());
-  }
-
-  /// Verifies a JWT token and returns the payload
-  static Map<String, dynamic>? verifyToken(String token) {
-    try {
-      final jwt = JWT.verify(token, SecretKey(Config.jwtSecret));
-      return Map<String, dynamic>.from(jwt.payload as Map);
-    } catch (_) {
-      return null;
-    }
-  }
-}
@@ -0,0 +1,165 @@
+import 'dart:convert';
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:bcrypt/bcrypt.dart';
+import 'package:crypto/crypto.dart';
+import 'package:crypton/crypton.dart' as crypton;
+import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart' as jwt;
+
+import '../../config/config.dart';
+
+class KeyPair {
+  final String publicKey;
+  final String privateKey;
+
+  KeyPair({required this.publicKey, required this.privateKey});
+
+  Map<String, dynamic> toJson() => {
+        'publicKey': publicKey,
+        'privateKey': privateKey,
+      };
+
+  factory KeyPair.fromJson(Map<String, dynamic> json) {
+    return KeyPair(
+      publicKey: json['publicKey'] as String,
+      privateKey: json['privateKey'] as String,
+    );
+  }
+}
+
+class CryptoService {
+  /// Generate a new ECDSA key pair
+  static KeyPair generateKeyPair() {
+    final keyPair = crypton.ECKeypair.fromRandom();
+    return KeyPair(
+      publicKey: keyPair.publicKey.toString(),
+      privateKey: keyPair.privateKey.toString(),
+    );
+  }
+
+  /// Sign data with private key
+  static String sign(String data, String privateKey) {
+    final privKey = crypton.ECPrivateKey.fromString(privateKey);
+    final message = Uint8List.fromList(utf8.encode(data));
+    final signature = privKey.createSHA256Signature(message);
+    return base64Encode(signature);
+  }
+
+  /// Verify signature with public key
+  static bool verify(String data, String signature, String publicKey) {
+    try {
+      final pubKey = crypton.ECPublicKey.fromString(publicKey);
+      final message = Uint8List.fromList(utf8.encode(data));
+      final signatureBytes = Uint8List.fromList(base64Decode(signature));
+      return pubKey.verifySHA256Signature(message, signatureBytes);
+    } catch (_) {
+      return false;
+    }
+  }
+
+  /// Encrypt private key with password (for storage/backup)
+  static EncryptedKey encryptPrivateKey(String privateKey, String password) {
+    final salt = BCrypt.gensalt();
+    final key = _deriveKey(password, salt);
+    final encrypted = _xorEncrypt(privateKey, key);
+    return EncryptedKey(
+      encryptedData: encrypted,
+      salt: salt,
+    );
+  }
+
+  /// Decrypt private key with password
+  static String? decryptPrivateKey(
+      String encryptedData, String salt, String password) {
+    try {
+      final key = _deriveKey(password, salt);
+      return _xorDecrypt(encryptedData, key);
+    } catch (_) {
+      return null;
+    }
+  }
+
+  static String _deriveKey(String password, String salt) {
+    final bytes = utf8.encode(password + salt);
+    final hash = sha256.convert(bytes);
+    return hash.toString();
+  }
+
+  static String _xorEncrypt(String data, String key) {
+    final dataBytes = utf8.encode(data);
+    final keyBytes = utf8.encode(key);
+    final encrypted = <int>[];
+    for (var i = 0; i < dataBytes.length; i++) {
+      encrypted.add(dataBytes[i] ^ keyBytes[i % keyBytes.length]);
+    }
+    return base64Encode(encrypted);
+  }
+
+  static String _xorDecrypt(String encrypted, String key) {
+    final encryptedBytes = base64Decode(encrypted);
+    final keyBytes = utf8.encode(key);
+    final decrypted = <int>[];
+    for (var i = 0; i < encryptedBytes.length; i++) {
+      decrypted.add(encryptedBytes[i] ^ keyBytes[i % keyBytes.length]);
+    }
+    return utf8.decode(decrypted);
+  }
+}
+
+class EncryptedKey {
+  final String encryptedData;
+  final String salt;
+
+  EncryptedKey({required this.encryptedData, required this.salt});
+
+  Map<String, dynamic> toJson() => {
+        'encryptedData': encryptedData,
+        'salt': salt,
+      };
+}
+
+class AuthService {
+  static final _nonceRandom = Random.secure();
+
+  /// Generate JWT token for user
+  static String generateToken(String userId, String username) {
+    final payload = {
+      'sub': userId,
+      'username': username,
+    };
+
+    final token = jwt.JWT(payload);
+    return token.sign(
+      jwt.SecretKey(Config.jwtSecret),
+      expiresIn: Config.tokenExpiry,
+    );
+  }
+
+  /// Verify JWT token and return payload
+  static Map<String, dynamic>? verifyToken(String token) {
+    try {
+      final verified = jwt.JWT.verify(token, jwt.SecretKey(Config.jwtSecret));
+      return Map<String, dynamic>.from(verified.payload as Map);
+    } catch (_) {
+      return null;
+    }
+  }
+
+  /// Hash password with bcrypt
+  static String hashPassword(String password) {
+    return BCrypt.hashpw(password, BCrypt.gensalt());
+  }
+
+  /// Verify password against hash
+  static bool verifyPassword(String password, String hash) {
+    return BCrypt.checkpw(password, hash);
+  }
+
+  /// Generate a nonce for signature verification
+  static String generateNonce() {
+    final bytes = List<int>.generate(32, (_) => _nonceRandom.nextInt(256));
+    final hash = sha256.convert(bytes);
+    return hash.toString().substring(0, 32);
+  }
+}
@@ -0,0 +1,442 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:relic/relic.dart';
+import 'package:web_socket/web_socket.dart';
+
+import '../auth/crypto_service.dart';
+import '../state/app_state.dart';
+
+final _gatewayRegistry = _GatewayRegistry();
+
+/// WebSocket gateway with JWT auth and channel subscriptions.
+Result gatewayHandler(Request req) {
+  final token = _extractGatewayToken(req);
+  if (token == null) {
+    return Response.unauthorized(
+      body: Body.fromString('Bearer token required'),
+    );
+  }
+
+  final payload = AuthService.verifyToken(token);
+  if (payload == null) {
+    return Response.forbidden(
+      body: Body.fromString('Invalid or expired token'),
+    );
+  }
+
+  final userId = payload['sub'] as String?;
+  final username = payload['username'] as String?;
+  if (userId == null || userId.isEmpty) {
+    return Response.forbidden(
+      body: Body.fromString('Invalid token payload'),
+    );
+  }
+
+  return WebSocketUpgrade((webSocket) {
+    webSocket.pingInterval = const Duration(seconds: 30);
+
+    final connection = _gatewayRegistry.register(
+      socket: webSocket,
+      userId: userId,
+      username: username,
+    );
+
+    _sendGatewayPayload(
+      connection.id,
+      {
+        'op': 'ready',
+        'connectionId': connection.id,
+        'userId': connection.userId,
+        if (connection.username != null) 'username': connection.username,
+      },
+    );
+
+    webSocket.events.listen(
+      (event) {
+        switch (event) {
+          case TextDataReceived(text: final text):
+            _handleGatewayTextMessage(connection.id, text);
+          case BinaryDataReceived():
+            _sendProtocolError(
+              connection.id,
+              'Binary payloads are not supported',
+            );
+          case CloseReceived():
+            _gatewayRegistry.unregister(connection.id);
+        }
+      },
+      onError: (_, __) {
+        _gatewayRegistry.unregister(connection.id);
+      },
+      onDone: () {
+        _gatewayRegistry.unregister(connection.id);
+      },
+    );
+  });
+}
+
+void broadcastMessageCreated({
+  required int channelId,
+  required Map<String, dynamic> message,
+}) {
+  _gatewayRegistry.broadcastToChannel(channelId, {
+    'op': 'event',
+    'event': 'message.created',
+    'channelId': channelId,
+    'message': message,
+    'emittedAt': DateTime.now().toUtc().toIso8601String(),
+  });
+}
+
+void broadcastMessageUpdated({
+  required int channelId,
+  required Map<String, dynamic> message,
+}) {
+  _gatewayRegistry.broadcastToChannel(channelId, {
+    'op': 'event',
+    'event': 'message.updated',
+    'channelId': channelId,
+    'message': message,
+    'emittedAt': DateTime.now().toUtc().toIso8601String(),
+  });
+}
+
+void broadcastMessageDeleted({
+  required int channelId,
+  required int messageId,
+}) {
+  _gatewayRegistry.broadcastToChannel(channelId, {
+    'op': 'event',
+    'event': 'message.deleted',
+    'channelId': channelId,
+    'messageId': messageId,
+    'emittedAt': DateTime.now().toUtc().toIso8601String(),
+  });
+}
+
+String? _extractGatewayToken(Request req) {
+  final authHeader = req.headers.authorization;
+  if (authHeader is BearerAuthorizationHeader) {
+    final token = authHeader.token.trim();
+    if (token.isNotEmpty) {
+      return token;
+    }
+  }
+
+  final rawAuthorization = req.headers[Headers.authorizationHeader];
+  if (rawAuthorization != null && rawAuthorization.isNotEmpty) {
+    final value = rawAuthorization.first.trim();
+    if (value.toLowerCase().startsWith('bearer ')) {
+      final token = value.substring(7).trim();
+      if (token.isNotEmpty) {
+        return token;
+      }
+    }
+  }
+
+  final queryToken = req.url.queryParameters['token']?.trim();
+  if (queryToken != null && queryToken.isNotEmpty) {
+    return queryToken;
+  }
+
+  final queryAccessToken = req.url.queryParameters['access_token']?.trim();
+  if (queryAccessToken != null && queryAccessToken.isNotEmpty) {
+    return queryAccessToken;
+  }
+
+  return null;
+}
+
+void _handleGatewayTextMessage(String connectionId, String text) {
+  final connection = _gatewayRegistry.getConnection(connectionId);
+  if (connection == null) {
+    return;
+  }
+
+  final payload = _decodePayload(text);
+  if (payload == null) {
+    _sendProtocolError(connectionId, 'Invalid JSON payload');
+    return;
+  }
+
+  final rawOp = payload['op'];
+  if (rawOp is! String || rawOp.trim().isEmpty) {
+    _sendProtocolError(connectionId, '`op` is required');
+    return;
+  }
+
+  switch (rawOp.trim().toLowerCase()) {
+    case 'subscribe':
+      _handleSubscribe(connectionId, payload);
+    case 'unsubscribe':
+      _handleUnsubscribe(connectionId, payload);
+    case 'ping':
+    case 'heartbeat':
+      _sendGatewayPayload(connectionId, {
+        'op': 'pong',
+        'ts': DateTime.now().toUtc().toIso8601String(),
+      });
+    case 'pong':
+      return;
+    default:
+      _sendProtocolError(connectionId, 'Unsupported op `$rawOp`');
+  }
+}
+
+void _handleSubscribe(String connectionId, Map<String, dynamic> payload) {
+  final channelIds = _parseChannelIds(payload);
+  if (channelIds.isEmpty) {
+    _sendProtocolError(
+      connectionId,
+      'subscribe requires `channelId` or `channelIds`',
+    );
+    return;
+  }
+
+  final knownChannelIds = <int>[];
+  final unknownChannelIds = <int>[];
+  for (final channelId in channelIds) {
+    if (channelBox.get(channelId) == null) {
+      unknownChannelIds.add(channelId);
+    } else {
+      knownChannelIds.add(channelId);
+    }
+  }
+
+  final subscribed = _gatewayRegistry.subscribe(connectionId, knownChannelIds);
+
+  _sendGatewayPayload(connectionId, {
+    'op': 'subscribed',
+    'channelIds': subscribed,
+    'subscriptions': _gatewayRegistry.subscriptions(connectionId),
+    if (unknownChannelIds.isNotEmpty) 'unknownChannelIds': unknownChannelIds,
+  });
+}
+
+void _handleUnsubscribe(String connectionId, Map<String, dynamic> payload) {
+  final channelIds = _parseChannelIds(payload);
+  if (channelIds.isEmpty) {
+    _sendProtocolError(
+      connectionId,
+      'unsubscribe requires `channelId` or `channelIds`',
+    );
+    return;
+  }
+
+  final unsubscribed = _gatewayRegistry.unsubscribe(connectionId, channelIds);
+
+  _sendGatewayPayload(connectionId, {
+    'op': 'unsubscribed',
+    'channelIds': unsubscribed,
+    'subscriptions': _gatewayRegistry.subscriptions(connectionId),
+  });
+}
+
+Map<String, dynamic>? _decodePayload(String text) {
+  try {
+    final decoded = jsonDecode(text);
+    if (decoded is Map<String, dynamic>) {
+      return decoded;
+    }
+    if (decoded is Map) {
+      return decoded.map(
+        (key, value) => MapEntry(key.toString(), value),
+      );
+    }
+    return null;
+  } catch (_) {
+    return null;
+  }
+}
+
+Set<int> _parseChannelIds(Map<String, dynamic> payload) {
+  final channelIds = <int>{};
+
+  void parseAndAdd(Object? value) {
+    final parsed = switch (value) {
+      int id when id > 0 => id,
+      String id => int.tryParse(id),
+      _ => null,
+    };
+    if (parsed != null && parsed > 0) {
+      channelIds.add(parsed);
+    }
+  }
+
+  parseAndAdd(payload['channelId']);
+  final channelIdList = payload['channelIds'];
+  if (channelIdList is List) {
+    for (final value in channelIdList) {
+      parseAndAdd(value);
+    }
+  }
+
+  return channelIds;
+}
+
+void _sendProtocolError(String connectionId, String message) {
+  _sendGatewayPayload(connectionId, {
+    'op': 'error',
+    'message': message,
+  });
+}
+
+void _sendGatewayPayload(String connectionId, Map<String, dynamic> payload) {
+  final connection = _gatewayRegistry.getConnection(connectionId);
+  if (connection == null) {
+    return;
+  }
+
+  final sent = _safeSend(connection, payload);
+  if (!sent) {
+    _gatewayRegistry.unregister(connectionId);
+  }
+}
+
+bool _safeSend(_GatewayConnection connection, Map<String, dynamic> payload) {
+  try {
+    return connection.socket.trySendText(jsonEncode(payload));
+  } catch (_) {
+    return false;
+  }
+}
+
+class _GatewayRegistry {
+  final Map<String, _GatewayConnection> _connections = {};
+  final Map<int, Set<String>> _subscribersByChannel = {};
+  int _nextConnectionId = 1;
+
+  _GatewayConnection register({
+    required RelicWebSocket socket,
+    required String userId,
+    String? username,
+  }) {
+    final id = 'gw_${_nextConnectionId++}';
+    final connection = _GatewayConnection(
+      id: id,
+      socket: socket,
+      userId: userId,
+      username: username,
+    );
+    _connections[id] = connection;
+    return connection;
+  }
+
+  _GatewayConnection? getConnection(String connectionId) {
+    return _connections[connectionId];
+  }
+
+  List<int> subscriptions(String connectionId) {
+    final connection = _connections[connectionId];
+    if (connection == null) {
+      return const <int>[];
+    }
+    return connection.subscriptions.toList()..sort();
+  }
+
+  List<int> subscribe(String connectionId, Iterable<int> channelIds) {
+    final connection = _connections[connectionId];
+    if (connection == null) {
+      return const <int>[];
+    }
+
+    for (final channelId in channelIds) {
+      connection.subscriptions.add(channelId);
+      _subscribersByChannel.putIfAbsent(channelId, () => <String>{}).add(
+            connectionId,
+          );
+    }
+
+    return channelIds.toSet().toList()..sort();
+  }
+
+  List<int> unsubscribe(String connectionId, Iterable<int> channelIds) {
+    final connection = _connections[connectionId];
+    if (connection == null) {
+      return const <int>[];
+    }
+
+    final removed = <int>[];
+    for (final channelId in channelIds) {
+      final didRemove = connection.subscriptions.remove(channelId);
+      if (didRemove) {
+        removed.add(channelId);
+      }
+
+      final subscribers = _subscribersByChannel[channelId];
+      if (subscribers != null) {
+        subscribers.remove(connectionId);
+        if (subscribers.isEmpty) {
+          _subscribersByChannel.remove(channelId);
+        }
+      }
+    }
+
+    removed.sort();
+    return removed;
+  }
+
+  void unregister(String connectionId) {
+    final connection = _connections.remove(connectionId);
+    if (connection == null) {
+      return;
+    }
+
+    for (final channelId in connection.subscriptions) {
+      final subscribers = _subscribersByChannel[channelId];
+      if (subscribers == null) {
+        continue;
+      }
+      subscribers.remove(connectionId);
+      if (subscribers.isEmpty) {
+        _subscribersByChannel.remove(channelId);
+      }
+    }
+
+    if (!connection.socket.isClosed) {
+      unawaited(connection.socket.tryClose(1000, 'Disconnected'));
+    }
+  }
+
+  void broadcastToChannel(int channelId, Map<String, dynamic> payload) {
+    final subscribers = _subscribersByChannel[channelId];
+    if (subscribers == null || subscribers.isEmpty) {
+      return;
+    }
+
+    final deadConnections = <String>[];
+    final subscriberIds = subscribers.toList(growable: false);
+    for (final connectionId in subscriberIds) {
+      final connection = _connections[connectionId];
+      if (connection == null) {
+        deadConnections.add(connectionId);
+        continue;
+      }
+
+      final sent = _safeSend(connection, payload);
+      if (!sent) {
+        deadConnections.add(connectionId);
+      }
+    }
+
+    for (final connectionId in deadConnections) {
+      unregister(connectionId);
+    }
+  }
+}
+
+class _GatewayConnection {
+  final String id;
+  final RelicWebSocket socket;
+  final String userId;
+  final String? username;
+  final Set<int> subscriptions = <int>{};
+
+  _GatewayConnection({
+    required this.id,
+    required this.socket,
+    required this.userId,
+    required this.username,
+  });
+}
@@ -1,54 +1,466 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:math';
+
 import 'package:chat_server/models.dart';
 import 'package:chat_server/objectbox.g.dart';
 import 'package:relic/relic.dart';

-import '../auth/auth_service.dart';
+import '../../config/config.dart';
+import '../auth/auth_middleware.dart';
+import '../auth/crypto_service.dart';
+import '../state/app_state.dart';
 import '../utils/extensions.dart';

+class RemoteIdentity {
+  final String userId;
+  final String username;
+  final String publicKey;
+  final String? displayName;
+  final String? avatarUrl;
+  final String? bio;
+
+  RemoteIdentity({
+    required this.userId,
+    required this.username,
+    required this.publicKey,
+    this.displayName,
+    this.avatarUrl,
+    this.bio,
+  });
+}
+
+/// Register on HOME server
+/// Creates user with keypair for identity
+Future<Response> registerHandler(Request req) async {
+  final body = await req.asJson();
+  final username = (body['username'] as String?)?.trim();
+  final password = body['password'] as String?;
+
+  if (username == null || username.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('Username required'),
+    );
+  }
+
+  if (password == null || password.length < 6) {
+    return Response.badRequest(
+      body: Body.fromString('Password must be at least 6 characters'),
+    );
+  }
+
+  // Check if username exists on this home server
+  final query = userBox
+      .query(
+        ChatUser_.username.equals(username) & ChatUser_.isLocal.equals(true),
+      )
+      .build();
+  final existing = query.findFirst();
+  query.close();
+
+  if (existing != null) {
+    return Response.badRequest(
+      body: Body.fromString('Username already taken'),
+    );
+  }
+
+  // Generate keypair for identity
+  final keyPair = CryptoService.generateKeyPair();
+
+  // Encrypt private key with password
+  final encryptedKey = CryptoService.encryptPrivateKey(
+    keyPair.privateKey,
+    password,
+  );
+
+  // Hash password
+  final passwordHash = AuthService.hashPassword(password);
+
+  // Create immutable opaque identity ID.
+  final userId = generateUserId();
+
+  final isBootstrapAdmin = Config.setupMode && _adminCount() < Config.bootstrapAdminLimit;
+  final roles = isBootstrapAdmin ? <String>['admin'] : <String>['member'];
+
+  final user = ChatUser(
+    userId: userId,
+    username: username,
+    publicKey: keyPair.publicKey,
+    isLocal: true,
+    homeServer: Config.publicBaseUrl,
+    passwordHash: passwordHash,
+    encryptedPrivateKey: encryptedKey.encryptedData,
+    keyPairSalt: encryptedKey.salt,
+    roles: roles,
+  );
+
+  final localId = userBox.put(user);
+
+  if (isBootstrapAdmin) {
+    print('🔐 Setup mode: granted initial admin to $userId');
+  }
+
+  // Generate token
+  final token = AuthService.generateToken(userId, username);
+
+  return Response.ok(
+    body: {
+      'token': token,
+      'userId': userId,
+      'username': user.username,
+      'handle': toUserHandle(user.username, Config.publicBaseUrl),
+      'publicKey': keyPair.publicKey,
+      'encryptedPrivateKey': encryptedKey.encryptedData,
+      'keyPairSalt': encryptedKey.salt,
+      'localId': localId,
+      'roles': roles,
+      'isBootstrapAdmin': isBootstrapAdmin,
+    }.toBody,
+  );
+}
+
+/// Login on HOME server
+/// Returns token + encrypted keypair for device sync
 Future<Response> loginHandler(Request req) async {
  final body = await req.asJson();
  final username = body['username'] as String?;
  final password = body['password'] as String?;

  if (username == null || password == null) {
-    return Response.badRequest(body: Body.fromString('Username and password required'));
+    return Response.badRequest(
+      body: Body.fromString('Username and password required'),
+    );
  }

-  final query = userBox.query(ChatUser_.username.equals(username)).build();
+  final query = userBox
+      .query(
+        ChatUser_.username.equals(username) & ChatUser_.isLocal.equals(true),
+      )
+      .build();
  final user = query.findFirst();
  query.close();

-  if (user == null || !AuthService.verifyPassword(password, user.passwordHash)) {
-    return Response.unauthorized(body: Body.fromString('Invalid credentials'));
+  if (user == null) {
+    return Response.unauthorized(
+      body: Body.fromString('Invalid credentials'),
+    );
  }

-  final token = AuthService.generateToken(user.id.toString(), username: user.username);
+  // Check if this is actually their home server
+  if (!user.isLocal) {
+    return Response.badRequest(
+      body: Body.fromString('This is not your home server. Login there instead.'),
+    );
+  }

-  return Response.ok(body: {'token': token, 'userId': user.id, 'username': user.username}.toBody);
+  // Verify password
+  if (!AuthService.verifyPassword(password, user.passwordHash!)) {
+    return Response.unauthorized(
+      body: Body.fromString('Invalid credentials'),
+    );
+  }
+
+  // Generate token
+  final token = AuthService.generateToken(user.userId, user.username);
+
+  return Response.ok(
+    body: {
+      'token': token,
+      'userId': user.userId,
+      'username': user.username,
+      'handle': toUserHandle(user.username, user.homeServer ?? Config.publicBaseUrl),
+      'displayName': user.displayName,
+      'avatarUrl': user.avatarUrl,
+      'publicKey': user.publicKey,
+      'encryptedPrivateKey': user.encryptedPrivateKey,
+      'keyPairSalt': user.keyPairSalt,
+      'localId': user.id,
+    }.toBody,
+  );
 }

-Future<Response> registerHandler(Request req) async {
+/// Join a GUEST server using signature verification
+/// No password required - proves identity via private key signature
+Future<Response> joinServerHandler(Request req) async {
  final body = await req.asJson();
-  final username = body['username'] as String?;
-  final password = body['password'] as String?;
+  final userId = body['userId'] as String?;
+  final username = (body['username'] as String?)?.trim();
+  final homeServer = body['homeServer'] as String?;
+  final timestamp = body['timestamp'] as int?;
+  final signature = body['signature'] as String?;

-  if (username == null || password == null) {
-    return Response.badRequest(body: Body.fromString('Username and password required'));
+  // Validate required fields
+  if (userId == null ||
+      userId.isEmpty ||
+      username == null ||
+      username.isEmpty ||
+      homeServer == null ||
+      homeServer.trim().isEmpty ||
+      timestamp == null ||
+      signature == null) {
+    return Response.badRequest(
+      body: Body.fromString('userId, username, homeServer, timestamp, and signature required'),
+    );
  }

-  final query = userBox.query(ChatUser_.username.equals(username)).build();
-  final existing = query.findFirst();
+  final resolvedHomeServer = normalizeHomeServer(homeServer);
+
+  if (resolvedHomeServer == null) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid homeServer URL'),
+    );
+  }
+
+  // Check timestamp is recent (within 5 minutes)
+  final now = DateTime.now().millisecondsSinceEpoch ~/ 1000;
+  if ((now - timestamp).abs() > 300) {
+    return Response.badRequest(
+      body: Body.fromString('Timestamp expired. Please sync your clock.'),
+    );
+  }
+
+  // Fetch current identity from home server
+  final identity = await fetchIdentityFromHomeServer(
+    resolvedHomeServer,
+    username,
+  );
+
+  if (identity == null) {
+    return Response.badRequest(
+      body: Body.fromString('Could not verify identity with home server'),
+    );
+  }
+
+  // Ensure fetched identity matches what caller claims
+  if (identity.userId != userId || identity.username != username) {
+    return Response.forbidden(
+      body: Body.fromString('Identity mismatch from home server'),
+    );
+  }
+
+  // Verify signature
+  // Signature is over: "{userId}:{timestamp}"
+  final messageToVerify = '$userId:$timestamp';
+  final isValid = CryptoService.verify(messageToVerify, signature, identity.publicKey);
+
+  if (!isValid) {
+    return Response.forbidden(
+      body: Body.fromString('Invalid signature'),
+    );
+  }
+
+  // Check if user already exists on this server
+  final existingQuery = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final existingUser = existingQuery.findFirst();
+  existingQuery.close();
+
+  if (existingUser != null) {
+    existingUser.username = identity.username;
+    existingUser.displayName = identity.displayName;
+    existingUser.avatarUrl = identity.avatarUrl;
+    existingUser.bio = identity.bio;
+    existingUser.publicKey = identity.publicKey;
+    existingUser.homeServer = resolvedHomeServer;
+    existingUser.lastSyncedAt = DateTime.now();
+    userBox.put(existingUser);
+
+    final token = AuthService.generateToken(existingUser.userId, existingUser.username);
+    userLocalIdProperty[req] = existingUser.id;
+
+    return Response.ok(
+      body: {
+        'token': token,
+        'userId': existingUser.userId,
+        'username': existingUser.username,
+        'handle': toUserHandle(existingUser.username, existingUser.homeServer ?? Config.publicBaseUrl),
+        'localId': existingUser.id,
+        'alreadyJoined': true,
+      }.toBody,
+    );
+  }
+
+  // Create local shadow account
+  final user = ChatUser(
+    userId: userId,
+    username: identity.username,
+    displayName: identity.displayName,
+    avatarUrl: identity.avatarUrl,
+    bio: identity.bio,
+    publicKey: identity.publicKey,
+    isLocal: false,
+    homeServer: resolvedHomeServer,
+    roles: ['member'],
+    lastSyncedAt: DateTime.now(),
+  );
+
+  final localId = userBox.put(user);
+
+  // Generate local token
+  final token = AuthService.generateToken(userId, user.username);
+
+  return Response.ok(
+    body: {
+      'token': token,
+      'userId': userId,
+      'username': user.username,
+      'handle': toUserHandle(user.username, user.homeServer ?? Config.publicBaseUrl),
+      'localId': localId,
+      'alreadyJoined': false,
+    }.toBody,
+  );
+}
+
+/// Fetch public identity from user's home server
+Future<RemoteIdentity?> fetchIdentityFromHomeServer(
+  String homeServer,
+  String username,
+) async {
+  final client = HttpClient();
+  client.connectionTimeout = const Duration(seconds: 5);
+
+  try {
+    final baseUrl = homeServer.replaceAll(RegExp(r'/$'), '');
+    final endpoint = Uri.parse('$baseUrl/.well-known/users/${Uri.encodeComponent(username)}');
+
+    final request = await client.getUrl(endpoint);
+    request.headers.set(HttpHeaders.acceptHeader, 'application/json');
+    final response = await request.close();
+
+    if (response.statusCode != HttpStatus.ok) {
+      return null;
+    }
+
+    final responseBody = await utf8.decodeStream(response);
+    final dynamic decoded = jsonDecode(responseBody);
+    if (decoded is! Map) {
+      return null;
+    }
+
+    final data = Map<String, dynamic>.from(decoded);
+    final userId = data['userId'] as String?;
+    final fetchedUsername = data['username'] as String?;
+    final publicKey = data['publicKey'] as String?;
+
+    if (userId == null || fetchedUsername == null || publicKey == null) {
+      return null;
+    }
+
+    return RemoteIdentity(
+      userId: userId,
+      username: fetchedUsername,
+      publicKey: publicKey,
+      displayName: data['displayName'] as String?,
+      avatarUrl: data['avatarUrl'] as String?,
+      bio: data['bio'] as String?,
+    );
+  } catch (e) {
+    print('Error fetching public key: $e');
+    return null;
+  } finally {
+    client.close(force: true);
+  }
+}
+
+String? normalizeHomeServer(String homeServerOrHost) {
+  final trimmed = homeServerOrHost.trim();
+  if (trimmed.isEmpty) {
+    return null;
+  }
+
+  final hasScheme = trimmed.contains('://');
+  final candidate = hasScheme ? trimmed : '${defaultSchemeForHost(trimmed)}://$trimmed';
+  final uri = Uri.tryParse(candidate);
+
+  if (uri == null || uri.host.isEmpty) {
+    return null;
+  }
+
+  final normalized = Uri(
+    scheme: uri.scheme,
+    userInfo: uri.userInfo,
+    host: uri.host,
+    port: uri.hasPort ? uri.port : null,
+  ).toString();
+
+  return normalized.replaceAll(RegExp(r'/$'), '');
+}
+
+String defaultSchemeForHost(String host) {
+  final lowerHost = host.toLowerCase();
+  if (lowerHost.startsWith('localhost') || lowerHost.startsWith('127.') || lowerHost.startsWith('[::1]')) {
+    return 'http';
+  }
+
+  return 'https';
+}
+
+int _adminCount() {
+  var count = 0;
+  final users = userBox.getAll();
+  for (final user in users) {
+    if (user.roles.contains('admin')) {
+      count++;
+    }
+  }
+  return count;
+}
+
+/// Get current user's profile
+Future<Response> getMeHandler(Request req) async {
+  final userId = userIdProperty[req];
+
+  if (userId == null) {
+    return Response.unauthorized(
+      body: Body.fromString('Not authenticated'),
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
  query.close();

-  if (existing != null) {
-    return Response.badRequest(body: Body.fromString('User already exists'));
+  if (user == null) {
+    return Response.notFound(
+      body: Body.fromString('User not found'),
+    );
  }

-  final hashedPassword = AuthService.hashPassword(password);
-  final user = ChatUser(username: username, passwordHash: hashedPassword);
-  final userId = userBox.put(user);
-
-  final token = AuthService.generateToken(userId.toString(), username: username);
-
-  return Response.ok(body: {'token': token, 'userId': userId, 'username': username}.toBody);
+  return Response.ok(
+    body: {
+      'userId': user.userId,
+      'username': user.username,
+      'handle': toUserHandle(user.username, user.homeServer ?? Config.publicBaseUrl),
+      'displayName': user.displayName,
+      'avatarUrl': user.avatarUrl,
+      'bio': user.bio,
+      'isLocal': user.isLocal,
+      'homeServer': user.homeServer,
+      'roles': user.roles,
+      'createdAt': user.createdAt.toIso8601String(),
+    }.toBody,
+  );
+}
+
+String generateUserId() {
+  const alphabet = '0123456789abcdefghijklmnopqrstuvwxyz';
+  final random = Random.secure();
+  while (true) {
+    final bytes = List<int>.generate(16, (_) => random.nextInt(256));
+    final id = bytes.map((b) => alphabet[b % alphabet.length]).join();
+    final query = userBox.query(ChatUser_.userId.equals(id)).build();
+    final exists = query.findFirst() != null;
+    query.close();
+    if (!exists) {
+      return id;
+    }
+  }
+}
+
+String toUserHandle(String username, String homeServer) {
+  final uri = Uri.tryParse(homeServer);
+  if (uri != null && uri.host.isNotEmpty) {
+    final host = uri.hasPort ? '${uri.host}:${uri.port}' : uri.host;
+    return '@$username@$host';
+  }
+  return '@$username@${homeServer.trim()}';
 }
@@ -2,36 +2,91 @@ import 'package:chat_server/models.dart';
 import 'package:chat_server/objectbox.g.dart';
 import 'package:relic/relic.dart';

+import '../state/app_state.dart';
 import '../utils/extensions.dart';

+/// Get all channels
 Future<Response> getChannelsHandler(Request req) async {
  final channels = channelBox.getAll();

  return Response.ok(
    body: {
      'channels': channels
-          .map((c) => {'id': c.id, 'name': c.name, 'description': c.description, 'createdAt': c.createdAt.toIso8601String()})
+          .map((c) => {
+                'id': c.id,
+                'name': c.name,
+                'description': c.description,
+                'createdAt': c.createdAt.toIso8601String(),
+              })
          .toList(),
    }.toBody,
  );
 }

+/// Create a channel (requires 'admin' role)
 Future<Response> createChannelHandler(Request req) async {
  final body = await req.asJson();
-  final name = (body['name'] as String?)?.trim().toLowerCase().replaceAll(' ', '-');
+  final name =
+      (body['name'] as String?)?.trim().toLowerCase().replaceAll(' ', '-');
  final description = body['description'] as String?;

  if (name == null || name.isEmpty) {
-    return Response.badRequest(body: Body.fromString('Channel name required'));
+    return Response.badRequest(
+      body: Body.fromString('Channel name required'),
+    );
  }

-  final existing = channelBox.query(ChatChannel_.name.equals(name)).build().findFirst();
+  // Check if channel exists
+  final existing =
+      channelBox.query(ChatChannel_.name.equals(name)).build().findFirst();
  if (existing != null) {
-    return Response.badRequest(body: Body.fromString('Channel already exists'));
+    return Response.badRequest(
+      body: Body.fromString('Channel already exists'),
+    );
  }

  final channel = ChatChannel(name: name, description: description);
  final id = channelBox.put(channel);

-  return Response.ok(body: {'id': id, 'name': name, 'description': description, 'createdAt': channel.createdAt.toIso8601String()}.toBody);
+  return Response.ok(
+    body: {
+      'id': id,
+      'name': name,
+      'description': description,
+      'createdAt': channel.createdAt.toIso8601String(),
+    }.toBody,
+  );
+}
+
+/// Get channel by ID
+Future<Response> getChannelHandler(Request req) async {
+  final channelIdStr = req.rawPathParameters[#channelId];
+  if (channelIdStr == null) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid channel ID'),
+    );
+  }
+
+  final channelId = int.tryParse(channelIdStr);
+  if (channelId == null) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid channel ID'),
+    );
+  }
+
+  final channel = channelBox.get(channelId);
+  if (channel == null) {
+    return Response.notFound(
+      body: Body.fromString('Channel not found'),
+    );
+  }
+
+  return Response.ok(
+    body: {
+      'id': channel.id,
+      'name': channel.name,
+      'description': channel.description,
+      'createdAt': channel.createdAt.toIso8601String(),
+    }.toBody,
+  );
 }
@@ -1,38 +0,0 @@
-import 'package:chat_server/objectbox.g.dart';
-import 'package:relic/relic.dart';
-
-import '../utils/extensions.dart';
-
-Future<Response> debugUsersHandler(Request req) async {
-  return Response.ok(
-    body: {
-      'users': userBox.getAll().map((u) => {'id': u.id, 'username': u.username}).toList(),
-    }.toBody,
-  );
-}
-
-Future<Response> debugMessagesHandler(Request req) async {
-  return Response.ok(
-    body: {
-      'messages': messageBox
-          .getAll()
-          .map(
-            (m) => {
-              'id': m.id,
-              'content': m.content,
-              'senderId': m.senderId,
-              'channelId': m.channelId,
-              'createdAt': m.createdAt.toIso8601String(),
-            },
-          )
-          .toList(),
-    }.toBody,
-  );
-}
-
-Future<Response> debugClearHandler(Request req) async {
-  messageBox.removeAll();
-  channelBox.removeAll();
-  userBox.removeAll();
-  return Response.ok(body: {'cleared': true}.toBody);
-}
@@ -0,0 +1,280 @@
+import 'dart:io';
+
+import 'package:chat_server/models.dart';
+import 'package:chat_server/objectbox.g.dart';
+import 'package:relic/relic.dart';
+
+import '../../config/config.dart';
+import '../auth/auth_middleware.dart';
+import '../state/app_state.dart';
+import '../utils/extensions.dart';
+
+const _maxSnapshotLimit = 500;
+
+Future<Response> getDevDbSnapshotHandler(Request req) async {
+  final guard = _guardDevDbTools(req);
+  if (guard != null) {
+    return guard;
+  }
+
+  final rawLimit = req.url.queryParameters['limit'];
+  final parsedLimit = rawLimit == null ? 100 : int.tryParse(rawLimit);
+  if (parsedLimit == null || parsedLimit <= 0) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid limit'),
+    );
+  }
+  final limit = parsedLimit > _maxSnapshotLimit ? _maxSnapshotLimit : parsedLimit;
+
+  final users = userBox.getAll().take(limit).map(_userToMap).toList();
+  final channels = channelBox.getAll().take(limit).map(_channelToMap).toList();
+  final messages = messageBox.getAll().take(limit).map(_messageToMap).toList();
+  final files = fileBox.getAll().take(limit).map(_fileToMap).toList();
+  final messageMedia = messageMediaBox.getAll().take(limit).map(_messageMediaToMap).toList();
+  final settings = serverSettingsBox.getAll().take(limit).map(_settingsToMap).toList();
+
+  return Response.ok(
+    body: {
+      'limit': limit,
+      'counts': {
+        'users': userBox.count(),
+        'channels': channelBox.count(),
+        'messages': messageBox.count(),
+        'files': fileBox.count(),
+        'messageMedia': messageMediaBox.count(),
+        'serverSettings': serverSettingsBox.count(),
+      },
+      'users': users,
+      'channels': channels,
+      'messages': messages,
+      'files': files,
+      'messageMedia': messageMedia,
+      'serverSettings': settings,
+    }.toBody,
+  );
+}
+
+Future<Response> resetDevDbHandler(Request req) async {
+  final guard = _guardDevDbTools(req);
+  if (guard != null) {
+    return guard;
+  }
+
+  final body = await req.asJson();
+  if ((body['confirm'] as String?) != 'RESET') {
+    return Response.badRequest(
+      body: Body.fromString('Body must include {"confirm":"RESET"}'),
+    );
+  }
+
+  messageBox.removeAll();
+  channelBox.removeAll();
+  fileBox.removeAll();
+  messageMediaBox.removeAll();
+  serverSettingsBox.removeAll();
+  userBox.removeAll();
+
+  final uploadsDir = Directory('uploads');
+  if (uploadsDir.existsSync()) {
+    for (final entity in uploadsDir.listSync()) {
+      if (entity is File) {
+        entity.deleteSync();
+      }
+    }
+  }
+
+  return Response.ok(
+    body: {
+      'reset': true,
+      'counts': {
+        'users': userBox.count(),
+        'channels': channelBox.count(),
+        'messages': messageBox.count(),
+        'files': fileBox.count(),
+        'messageMedia': messageMediaBox.count(),
+        'serverSettings': serverSettingsBox.count(),
+      },
+    }.toBody,
+  );
+}
+
+Future<Response> promoteUserToAdminHandler(Request req) async {
+  final guard = _guardDevDbTools(req);
+  if (guard != null) {
+    return guard;
+  }
+
+  final body = await req.asJson();
+  final userId = (body['userId'] as String?)?.trim();
+  if (userId == null || userId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('userId is required'),
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null) {
+    return Response.notFound(
+      body: Body.fromString('User not found'),
+    );
+  }
+
+  if (!user.roles.contains('admin')) {
+    user.roles = [...user.roles, 'admin'];
+    userBox.put(user);
+  }
+
+  return Response.ok(
+    body: {
+      'updated': true,
+      'userId': user.userId,
+      'roles': user.roles,
+    }.toBody,
+  );
+}
+
+Future<Response> demoteUserFromAdminHandler(Request req) async {
+  final guard = _guardDevDbTools(req);
+  if (guard != null) {
+    return guard;
+  }
+
+  final body = await req.asJson();
+  final userId = (body['userId'] as String?)?.trim();
+  if (userId == null || userId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('userId is required'),
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null) {
+    return Response.notFound(
+      body: Body.fromString('User not found'),
+    );
+  }
+
+  user.roles = user.roles.where((role) => role != 'admin').toList();
+  userBox.put(user);
+
+  return Response.ok(
+    body: {
+      'updated': true,
+      'userId': user.userId,
+      'roles': user.roles,
+    }.toBody,
+  );
+}
+
+Response? _guardDevDbTools(Request req) {
+  if (!Config.devDbTools) {
+    return Response.forbidden(
+      body: Body.fromString('Dev DB tools are disabled in config'),
+    );
+  }
+
+  final authUserId = userIdProperty[req];
+  if (authUserId == null) {
+    return Response.unauthorized(
+      body: Body.fromString('Not authenticated'),
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(authUserId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null) {
+    return Response.unauthorized(
+      body: Body.fromString('User not found'),
+    );
+  }
+  if (!user.roles.contains('admin')) {
+    return Response.forbidden(
+      body: Body.fromString('Admin role required'),
+    );
+  }
+
+  return null;
+}
+
+Map<String, dynamic> _userToMap(ChatUser user) => {
+      'id': user.id,
+      'userId': user.userId,
+      'username': user.username,
+      'displayName': user.displayName,
+      'avatarUrl': user.avatarUrl,
+      'bio': user.bio,
+      'isLocal': user.isLocal,
+      'homeServer': user.homeServer,
+      'roles': user.roles,
+      'createdAt': user.createdAt.toIso8601String(),
+      'lastSyncedAt': user.lastSyncedAt?.toIso8601String(),
+    };
+
+Map<String, dynamic> _channelToMap(ChatChannel channel) => {
+      'id': channel.id,
+      'name': channel.name,
+      'description': channel.description,
+      'createdAt': channel.createdAt.toIso8601String(),
+    };
+
+Map<String, dynamic> _messageToMap(ChatMessage message) => {
+      'id': message.id,
+      'channelId': message.channelId,
+      'authorLocalId': message.authorLocalId,
+      'authorUserId': message.authorUserId,
+      'authorUsername': message.authorUsername,
+      'content': message.content,
+      'componentsJson': message.componentsJson,
+      'createdAt': message.createdAt.toIso8601String(),
+      'editedAt': message.editedAt?.toIso8601String(),
+    };
+
+Map<String, dynamic> _fileToMap(ChatFile file) => {
+      'id': file.id,
+      'attachmentId': file.attachmentId,
+      'uploaderId': file.uploaderId,
+      'path': file.path,
+      'originalFileName': file.originalFileName,
+      'storedFileName': file.storedFileName,
+      'mimeType': file.mimeType,
+      'sizeBytes': file.sizeBytes,
+      'width': file.width,
+      'height': file.height,
+      'usageType': file.usageType,
+      'status': file.status,
+      'isAttached': file.isAttached,
+      'createdAt': file.createdAt.toIso8601String(),
+    };
+
+Map<String, dynamic> _settingsToMap(ServerSettings settings) => {
+      'id': settings.id,
+      'singletonKey': settings.singletonKey,
+      'serverName': settings.serverName,
+      'description': settings.description,
+      'iconAttachmentId': settings.iconAttachmentId,
+      'bannerAttachmentId': settings.bannerAttachmentId,
+      'updatedByUserId': settings.updatedByUserId,
+      'updatedAt': settings.updatedAt.toIso8601String(),
+    };
+
+Map<String, dynamic> _messageMediaToMap(ChatMessageMedia media) => {
+      'id': media.id,
+      'messageId': media.messageId,
+      'channelId': media.channelId,
+      'authorUserId': media.authorUserId,
+      'attachmentId': media.attachmentId,
+      'externalUrl': media.externalUrl,
+      'kind': media.kind,
+      'mimeType': media.mimeType,
+      'originalFileName': media.originalFileName,
+      'sizeBytes': media.sizeBytes,
+      'width': media.width,
+      'height': media.height,
+      'thumbHash': media.thumbHash,
+      'createdAt': media.createdAt.toIso8601String(),
+    };
@@ -0,0 +1,114 @@
+import 'package:chat_server/objectbox.g.dart';
+import 'package:relic/relic.dart';
+
+import '../../config/config.dart';
+import 'auth_handlers.dart';
+import '../state/app_state.dart';
+import '../utils/extensions.dart';
+
+/// Public endpoint for cross-server identity verification
+/// Called by other servers to verify a user's public key
+///
+/// GET /.well-known/users/{username}
+/// Returns: { userId, publicKey, username, displayName, avatarUrl }
+Future<Response> publicUserHandler(Request req) async {
+  final username = req.rawPathParameters[#username];
+  if (username == null) {
+    return Response.badRequest(
+      body: Body.fromString('Username required'),
+    );
+  }
+
+  final query = userBox
+      .query(
+        ChatUser_.username.equals(username) & ChatUser_.isLocal.equals(true),
+      )
+      .build();
+
+  final user = query.findFirst();
+  query.close();
+
+  if (user == null) {
+    return Response.notFound(
+      body: Body.fromString('User not found'),
+    );
+  }
+
+  return Response.ok(
+    body: {
+      'userId': user.userId,
+      'username': user.username,
+      'displayName': user.displayName,
+      'handle': toUserHandle(user.username, user.homeServer ?? Config.publicBaseUrl),
+      'avatarUrl': user.avatarUrl,
+      'bio': user.bio,
+      'publicKey': user.publicKey,
+      'homeServer': user.homeServer ?? Config.publicBaseUrl,
+      'createdAt': user.createdAt.toIso8601String(),
+    }.toBody,
+  );
+}
+
+/// Public endpoint to verify a user exists
+/// Lightweight check without full profile
+///
+/// GET /.well-known/verify/{userId}
+/// Returns: { exists, userId, publicKey }
+Future<Response> publicVerifyHandler(Request req) async {
+  final userId = req.rawPathParameters[#userId];
+  if (userId == null) {
+    return Response.badRequest(
+      body: Body.fromString('userId required'),
+    );
+  }
+
+  final query = userBox
+      .query(
+        ChatUser_.userId.equals(userId) & ChatUser_.isLocal.equals(true),
+      )
+      .build();
+
+  final user = query.findFirst();
+  query.close();
+
+  if (user == null) {
+    return Response.ok(
+      body: {
+        'exists': false,
+        'userId': userId,
+      }.toBody,
+    );
+  }
+
+  return Response.ok(
+    body: {
+      'exists': true,
+      'userId': user.userId,
+      'publicKey': user.publicKey,
+      'username': user.username,
+      'handle': toUserHandle(user.username, user.homeServer ?? Config.publicBaseUrl),
+    }.toBody,
+  );
+}
+
+/// Public server info
+///
+/// GET /.well-known/server
+/// Returns: { serverHost, serverName, version }
+Future<Response> publicServerInfoHandler(Request req) async {
+  final settingsQuery = serverSettingsBox.query(ServerSettings_.singletonKey.equals('default')).build();
+  final settings = settingsQuery.findFirst();
+  settingsQuery.close();
+
+  return Response.ok(
+    body: {
+      'serverHost': Config.publicHost,
+      'publicBaseUrl': Config.publicBaseUrl,
+      'serverName': settings?.serverName ?? Config.serverName,
+      'version': '0.1.0',
+      'iconUrl': settings?.iconAttachmentId == null ? null : '/icons/${Uri.encodeComponent(Config.publicHost)}',
+      'bannerUrl': settings?.bannerAttachmentId == null ? null : '/banners/${Uri.encodeComponent(Config.publicHost)}',
+      'features': ['identity', 'chat', 'sticker-packs'],
+    }.toBody,
+  );
+}
@@ -0,0 +1,348 @@
+import 'dart:io';
+
+import 'package:chat_server/models.dart';
+import 'package:chat_server/objectbox.g.dart';
+import 'package:relic/relic.dart';
+
+import '../../config/config.dart';
+import '../auth/auth_middleware.dart';
+import '../state/app_state.dart';
+import '../utils/extensions.dart';
+
+Future<Response> getServerSettingsHandler(Request req) async {
+  final auth = _requireCurrentUser(req);
+  if (auth.$2 != null) {
+    return auth.$2!;
+  }
+
+  final settings = _ensureServerSettings();
+  return Response.ok(
+    body: _serverSettingsToMap(settings).toBody,
+  );
+}
+
+Future<Response> patchServerSettingsHandler(Request req) async {
+  final auth = _requireCurrentUser(req);
+  if (auth.$2 != null) {
+    return auth.$2!;
+  }
+  final user = auth.$1!;
+  if (!_isAdmin(user)) {
+    return Response.forbidden(
+      body: Body.fromString('Admin role required'),
+    );
+  }
+
+  final body = await req.asJson();
+  final settings = _ensureServerSettings();
+
+  final nextServerName = (body['serverName'] as String?)?.trim();
+  final nextDescription = (body['description'] as String?)?.trim();
+
+  if (nextServerName != null && nextServerName.isNotEmpty) {
+    settings.serverName = nextServerName;
+  }
+  if (body.containsKey('description')) {
+    settings.description = nextDescription != null && nextDescription.isNotEmpty ? nextDescription : null;
+  }
+
+  settings.updatedByUserId = user.userId;
+  settings.updatedAt = DateTime.now();
+  serverSettingsBox.put(settings);
+
+  return Response.ok(
+    body: _serverSettingsToMap(settings).toBody,
+  );
+}
+
+Future<Response> updateProfileHandler(Request req) async {
+  final auth = _requireCurrentUser(req);
+  if (auth.$2 != null) {
+    return auth.$2!;
+  }
+  final user = auth.$1!;
+
+  final body = await req.asJson();
+  final displayName = (body['displayName'] as String?)?.trim();
+  final bio = (body['bio'] as String?)?.trim();
+
+  if (body.containsKey('displayName')) {
+    user.displayName = displayName != null && displayName.isNotEmpty ? displayName : null;
+  }
+  if (body.containsKey('bio')) {
+    user.bio = bio != null && bio.isNotEmpty ? bio : null;
+  }
+
+  userBox.put(user);
+
+  return Response.ok(
+    body: {
+      'userId': user.userId,
+      'username': user.username,
+      'displayName': user.displayName,
+      'avatarUrl': user.avatarUrl,
+      'bio': user.bio,
+      'roles': user.roles,
+    }.toBody,
+  );
+}
+
+Future<Response> setAvatarHandler(Request req) async {
+  final auth = _requireCurrentUser(req);
+  if (auth.$2 != null) {
+    return auth.$2!;
+  }
+  final user = auth.$1!;
+
+  final body = await req.asJson();
+  final attachmentId = (body['attachmentId'] as String?)?.trim();
+  if (attachmentId == null || attachmentId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('attachmentId is required'),
+    );
+  }
+
+  final query = fileBox.query(ChatFile_.attachmentId.equals(attachmentId)).build();
+  final file = query.findFirst();
+  query.close();
+  if (file == null || file.status != 'ready') {
+    return Response.notFound(
+      body: Body.fromString('Attachment not found or not ready'),
+    );
+  }
+  if (file.uploaderId != user.id) {
+    return Response.forbidden(
+      body: Body.fromString('Attachment must be uploaded by current user'),
+    );
+  }
+
+  file.usageType = 'avatar';
+  fileBox.put(file);
+
+  user.avatarUrl = '/avatars/${Uri.encodeComponent(user.userId)}';
+  userBox.put(user);
+
+  return Response.ok(
+    body: {
+      'userId': user.userId,
+      'avatarAttachmentId': file.attachmentId,
+      'avatarUrl': user.avatarUrl,
+    }.toBody,
+  );
+}
+
+Future<Response> setServerIconHandler(Request req) async {
+  return _setServerMedia(req, usageType: 'server_icon', target: 'icon');
+}
+
+Future<Response> setServerBannerHandler(Request req) async {
+  return _setServerMedia(req, usageType: 'server_banner', target: 'banner');
+}
+
+Future<Response> getAvatarAliasHandler(Request req) async {
+  final userId = req.rawPathParameters[#userId];
+  if (userId == null || userId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('userId is required'),
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null || user.avatarUrl == null) {
+    return Response.notFound(
+      body: Body.fromString('Avatar not found'),
+    );
+  }
+
+  final avatarQuery = fileBox
+      .query(
+        ChatFile_.uploaderId.equals(user.id) & ChatFile_.usageType.equals('avatar') & ChatFile_.status.equals('ready'),
+      )
+      .order(ChatFile_.id, flags: Order.descending)
+      .build();
+  final avatar = avatarQuery.findFirst();
+  avatarQuery.close();
+  if (avatar == null) {
+    return Response.notFound(
+      body: Body.fromString('Avatar not found'),
+    );
+  }
+  return _serveAttachment(avatar.attachmentId, mutableAlias: true);
+}
+
+Future<Response> getServerIconAliasHandler(Request req) async {
+  final serverId = req.rawPathParameters[#serverId];
+  if (!_matchesCurrentServer(serverId)) {
+    return Response.notFound(
+      body: Body.fromString('Server not found'),
+    );
+  }
+  final settings = _ensureServerSettings();
+  final attachmentId = settings.iconAttachmentId;
+  if (attachmentId == null || attachmentId.isEmpty) {
+    return Response.notFound(
+      body: Body.fromString('Server icon not found'),
+    );
+  }
+  return _serveAttachment(attachmentId, mutableAlias: true);
+}
+
+Future<Response> getServerBannerAliasHandler(Request req) async {
+  final serverId = req.rawPathParameters[#serverId];
+  if (!_matchesCurrentServer(serverId)) {
+    return Response.notFound(
+      body: Body.fromString('Server not found'),
+    );
+  }
+  final settings = _ensureServerSettings();
+  final attachmentId = settings.bannerAttachmentId;
+  if (attachmentId == null || attachmentId.isEmpty) {
+    return Response.notFound(
+      body: Body.fromString('Server banner not found'),
+    );
+  }
+  return _serveAttachment(attachmentId, mutableAlias: true);
+}
+
+Future<Response> _setServerMedia(
+  Request req, {
+  required String usageType,
+  required String target,
+}) async {
+  final auth = _requireCurrentUser(req);
+  if (auth.$2 != null) {
+    return auth.$2!;
+  }
+  final user = auth.$1!;
+  if (!_isAdmin(user)) {
+    return Response.forbidden(
+      body: Body.fromString('Admin role required'),
+    );
+  }
+
+  final body = await req.asJson();
+  final attachmentId = (body['attachmentId'] as String?)?.trim();
+  if (attachmentId == null || attachmentId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('attachmentId is required'),
+    );
+  }
+
+  final query = fileBox.query(ChatFile_.attachmentId.equals(attachmentId)).build();
+  final file = query.findFirst();
+  query.close();
+  if (file == null || file.status != 'ready') {
+    return Response.notFound(
+      body: Body.fromString('Attachment not found or not ready'),
+    );
+  }
+
+  file.usageType = usageType;
+  fileBox.put(file);
+
+  final settings = _ensureServerSettings();
+  if (target == 'icon') {
+    settings.iconAttachmentId = attachmentId;
+  } else {
+    settings.bannerAttachmentId = attachmentId;
+  }
+  settings.updatedByUserId = user.userId;
+  settings.updatedAt = DateTime.now();
+  serverSettingsBox.put(settings);
+
+  return Response.ok(
+    body: _serverSettingsToMap(settings).toBody,
+  );
+}
+
+(ChatUser?, Response?) _requireCurrentUser(Request req) {
+  final userId = userIdProperty[req];
+  if (userId == null) {
+    return (null, Response.unauthorized(body: Body.fromString('Not authenticated')));
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null) {
+    return (null, Response.unauthorized(body: Body.fromString('User not found')));
+  }
+
+  return (user, null);
+}
+
+bool _isAdmin(ChatUser user) => user.roles.contains('admin');
+
+ServerSettings _ensureServerSettings() {
+  final query = serverSettingsBox.query(ServerSettings_.singletonKey.equals('default')).build();
+  final existing = query.findFirst();
+  query.close();
+  if (existing != null) {
+    return existing;
+  }
+
+  final settings = ServerSettings(serverName: Config.serverName);
+  settings.id = serverSettingsBox.put(settings);
+  return settings;
+}
+
+bool _matchesCurrentServer(String? serverId) {
+  if (serverId == null || serverId.isEmpty) {
+    return false;
+  }
+  if (serverId == 'current') {
+    return true;
+  }
+  return serverId == Config.publicHost;
+}
+
+Map<String, dynamic> _serverSettingsToMap(ServerSettings settings) {
+  return {
+    'serverId': Config.publicHost,
+    'publicBaseUrl': Config.publicBaseUrl,
+    'serverName': settings.serverName,
+    'description': settings.description,
+    'iconUrl': settings.iconAttachmentId == null ? null : '/icons/${Uri.encodeComponent(Config.publicHost)}',
+    'bannerUrl': settings.bannerAttachmentId == null ? null : '/banners/${Uri.encodeComponent(Config.publicHost)}',
+    'iconAttachmentId': settings.iconAttachmentId,
+    'bannerAttachmentId': settings.bannerAttachmentId,
+    'updatedAt': settings.updatedAt.toIso8601String(),
+    'updatedByUserId': settings.updatedByUserId,
+  };
+}
+
+Future<Response> _serveAttachment(
+  String attachmentId, {
+  required bool mutableAlias,
+}) async {
+  final query = fileBox.query(ChatFile_.attachmentId.equals(attachmentId)).build();
+  final file = query.findFirst();
+  query.close();
+  if (file == null || file.status != 'ready' || file.storedFileName.isEmpty) {
+    return Response.notFound(
+      body: Body.fromString('Attachment not found'),
+    );
+  }
+
+  final diskPath = 'uploads${Platform.pathSeparator}${file.storedFileName}';
+  final diskFile = File(diskPath);
+  if (!diskFile.existsSync()) {
+    return Response.notFound(
+      body: Body.fromString('Attachment file missing on disk'),
+    );
+  }
+
+  final cacheControl = mutableAlias ? 'public, max-age=0, must-revalidate' : 'public, max-age=31536000, immutable';
+
+  return Response.ok(
+    headers: Headers.fromMap(
+      {
+        Headers.contentTypeHeader: [file.mimeType],
+        Headers.cacheControlHeader: [cacheControl],
+      },
+    ),
+    body: Body.fromData(diskFile.readAsBytesSync()),
+  );
+}
@@ -0,0 +1,529 @@
+import 'dart:io';
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:chat_server/models.dart';
+import 'package:chat_server/objectbox.g.dart';
+import 'package:crypto/crypto.dart';
+import 'package:mime/mime.dart';
+import 'package:relic/relic.dart';
+
+import '../auth/auth_middleware.dart';
+import '../state/app_state.dart';
+import '../utils/extensions.dart';
+import 'message_handlers.dart';
+
+const _uploadsDir = 'uploads';
+const _maxUploadBytes = 50 * 1024 * 1024;
+
+Future<Response> initUploadHandler(Request req) async {
+  final currentUser = _requireCurrentUser(req);
+  if (currentUser.$2 != null) {
+    return currentUser.$2!;
+  }
+  final user = currentUser.$1!;
+
+  final body = await req.asJson();
+  final usageType = (body['usageType'] as String?)?.trim() ?? 'message';
+  final originalFileName = (body['originalFileName'] as String?)?.trim() ?? '';
+  final declaredMimeType = (body['mimeType'] as String?)?.trim() ?? 'application/octet-stream';
+  final declaredWidth = _asInt(body['width']) ?? 0;
+  final declaredHeight = _asInt(body['height']) ?? 0;
+  final declaredSizeBytes = _asInt(body['sizeBytes']) ?? 0;
+
+  if (!_isAllowedUsageType(usageType)) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid usageType'),
+    );
+  }
+
+  final attachmentId = _generateAttachmentId();
+  final entity = ChatFile(
+    attachmentId: attachmentId,
+    uploaderId: user.id,
+    path: '',
+    originalFileName: originalFileName.isEmpty ? 'upload-${attachmentId.substring(0, 8)}' : originalFileName,
+    storedFileName: '',
+    sha256: '',
+    mimeType: declaredMimeType,
+    width: declaredWidth,
+    height: declaredHeight,
+    sizeBytes: declaredSizeBytes,
+    usageType: usageType,
+    status: 'pending',
+  );
+
+  final id = fileBox.put(entity);
+  entity.id = id;
+
+  return Response.ok(
+    body: {
+      'uploadId': entity.attachmentId,
+      'attachmentId': entity.attachmentId,
+      'status': entity.status,
+      'usageType': entity.usageType,
+    }.toBody,
+  );
+}
+
+Future<Response> completeUploadHandler(Request req) async {
+  final currentUser = _requireCurrentUser(req);
+  if (currentUser.$2 != null) {
+    return currentUser.$2!;
+  }
+  final user = currentUser.$1!;
+
+  final uploadId = req.rawPathParameters[#uploadId];
+  if (uploadId == null || uploadId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('uploadId is required'),
+    );
+  }
+
+  final query = fileBox.query(ChatFile_.attachmentId.equals(uploadId)).build();
+  final file = query.findFirst();
+  query.close();
+
+  if (file == null) {
+    return Response.notFound(
+      body: Body.fromString('Upload not found'),
+    );
+  }
+
+  if (file.uploaderId != user.id) {
+    return Response.forbidden(
+      body: Body.fromString('You cannot complete another user\'s upload'),
+    );
+  }
+
+  if (file.status == 'ready') {
+    return Response.ok(body: _fileResponseMap(file).toBody);
+  }
+
+  final uploadData = await _readUploadData(req);
+  if (uploadData.$2 != null) {
+    file.status = 'failed';
+    file.errorCode = 'invalid_upload_payload';
+    fileBox.put(file);
+    return uploadData.$2!;
+  }
+  final bytes = uploadData.$1!;
+  final payloadMimeType = uploadData.$3;
+  final payloadFileName = uploadData.$4;
+
+  if (bytes.isEmpty) {
+    file.status = 'failed';
+    file.errorCode = 'empty_file';
+    fileBox.put(file);
+    return Response.badRequest(
+      body: Body.fromString('Uploaded file is empty'),
+    );
+  }
+
+  _finalizeUpload(
+    file: file,
+    bytes: bytes,
+    payloadMimeType: payloadMimeType,
+    payloadFileName: payloadFileName,
+  );
+
+  await resolvePendingUploadsInMessages(file.attachmentId);
+
+  return Response.ok(
+    body: _fileResponseMap(file).toBody,
+  );
+}
+
+Future<Response> uploadFileHandler(Request req) async {
+  final currentUser = _requireCurrentUser(req);
+  if (currentUser.$2 != null) {
+    return currentUser.$2!;
+  }
+  final user = currentUser.$1!;
+
+  final uploadData = await _readUploadData(req);
+  if (uploadData.$2 != null) {
+    return uploadData.$2!;
+  }
+  final bytes = uploadData.$1!;
+  final payloadMimeType = uploadData.$3;
+  final payloadFileName = uploadData.$4;
+
+  final attachmentId = _generateAttachmentId();
+  final file = ChatFile(
+    attachmentId: attachmentId,
+    uploaderId: user.id,
+    path: '',
+    originalFileName: payloadFileName ?? 'upload-${attachmentId.substring(0, 8)}',
+    storedFileName: '',
+    sha256: '',
+    mimeType: _normalizeMimeType(payloadMimeType),
+    width: 0,
+    height: 0,
+    sizeBytes: bytes.length,
+    usageType: 'message',
+    status: 'pending',
+  );
+  file.id = fileBox.put(file);
+
+  _finalizeUpload(
+    file: file,
+    bytes: bytes,
+    payloadMimeType: payloadMimeType,
+    payloadFileName: payloadFileName,
+  );
+
+  return Response.ok(
+    body: _fileResponseMap(file).toBody,
+  );
+}
+
+Future<Response> getAttachmentHandler(Request req) async {
+  final attachmentId = req.rawPathParameters[#attachmentId];
+  if (attachmentId == null || attachmentId.isEmpty) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid attachment ID'),
+    );
+  }
+
+  final query = fileBox.query(ChatFile_.attachmentId.equals(attachmentId)).build();
+  final file = query.findFirst();
+  query.close();
+
+  if (file == null || file.status != 'ready') {
+    return Response.notFound(
+      body: Body.fromString('Attachment not found'),
+    );
+  }
+
+  final diskPath = _resolveDiskPath(file);
+  final diskFile = File(diskPath);
+  if (!diskFile.existsSync()) {
+    return Response.notFound(
+      body: Body.fromString('Attachment file missing on disk'),
+    );
+  }
+
+  return Response.ok(
+    headers: Headers.fromMap(
+      {
+        Headers.contentTypeHeader: [file.mimeType],
+        Headers.cacheControlHeader: ['public, max-age=31536000, immutable'],
+      },
+    ),
+    body: Body.fromData(diskFile.readAsBytesSync()),
+  );
+}
+
+Future<Response> getUploadFileHandler(Request req) async {
+  final fileName = req.rawPathParameters[#fileName];
+  if (fileName == null || fileName.isEmpty || fileName.contains('..')) {
+    return Response.badRequest(
+      body: Body.fromString('Invalid file name'),
+    );
+  }
+
+  final diskPath = '$_uploadsDir${Platform.pathSeparator}$fileName';
+  final file = File(diskPath);
+  if (!file.existsSync()) {
+    return Response.notFound(
+      body: Body.fromString('File not found'),
+    );
+  }
+
+  return Response.ok(
+    body: Body.fromData(file.readAsBytesSync()),
+  );
+}
+
+(ChatUser?, Response?) _requireCurrentUser(Request req) {
+  final userId = userIdProperty[req];
+  if (userId == null) {
+    return (
+      null,
+      Response.unauthorized(
+        body: Body.fromString('Not authenticated'),
+      )
+    );
+  }
+
+  final query = userBox.query(ChatUser_.userId.equals(userId)).build();
+  final user = query.findFirst();
+  query.close();
+  if (user == null) {
+    return (
+      null,
+      Response.unauthorized(
+        body: Body.fromString('User not found'),
+      )
+    );
+  }
+
+  return (user, null);
+}
+
+Future<(Uint8List?, Response?, String?, String?)> _readUploadData(Request req) async {
+  final contentTypeHeader = req.headers[Headers.contentTypeHeader]?.first;
+  final boundary = _extractBoundary(contentTypeHeader);
+
+  if (boundary != null) {
+    final multipartParts =
+        await req.read(maxLength: _maxUploadBytes).cast<List<int>>().transform(MimeMultipartTransformer(boundary)).toList();
+    if (multipartParts.isEmpty) {
+      return (null, Response.badRequest(body: Body.fromString('No files in request')), null, null);
+    }
+
+    final uploadPart = multipartParts.firstWhere(
+      (part) => (part.headers['content-disposition'] ?? '').contains('filename='),
+      orElse: () => multipartParts.first,
+    );
+
+    final bytesBuilder = BytesBuilder(copy: false);
+    await for (final chunk in uploadPart) {
+      bytesBuilder.add(chunk);
+    }
+    final bytes = bytesBuilder.toBytes();
+    final mimeType = uploadPart.headers['content-type'];
+    final filename = _extractFilename(uploadPart.headers['content-disposition'] ?? '');
+
+    return (bytes, null, mimeType, filename);
+  }
+
+  final bytesBuilder = BytesBuilder(copy: false);
+  await for (final chunk in req.read(maxLength: _maxUploadBytes)) {
+    bytesBuilder.add(chunk);
+  }
+
+  final mimeType = contentTypeHeader;
+  return (bytesBuilder.toBytes(), null, mimeType, null);
+}
+
+Map<String, dynamic> _fileResponseMap(ChatFile file) {
+  return {
+    'uploadId': file.attachmentId,
+    'attachmentId': file.attachmentId,
+    'id': file.id,
+    'url': file.path,
+    'status': file.status,
+    'usageType': file.usageType,
+    'originalFileName': file.originalFileName,
+    'storedFileName': file.storedFileName,
+    'mimeType': file.mimeType,
+    'sizeBytes': file.sizeBytes,
+    'width': file.width,
+    'height': file.height,
+    'sha256': file.sha256,
+  };
+}
+
+void _finalizeUpload({
+  required ChatFile file,
+  required Uint8List bytes,
+  String? payloadMimeType,
+  String? payloadFileName,
+}) {
+  final detectedMime = _normalizeMimeType(
+    payloadMimeType ?? file.mimeType,
+  );
+  final dimensions = _extractImageDimensions(bytes, detectedMime);
+  final extension = _resolveExtension(
+    payloadFileName ?? file.originalFileName,
+    detectedMime,
+  );
+  final storedFileName = '${file.attachmentId}$extension';
+
+  final directory = Directory(_uploadsDir);
+  if (!directory.existsSync()) {
+    directory.createSync(recursive: true);
+  }
+
+  final diskPath = '${directory.path}${Platform.pathSeparator}$storedFileName';
+  File(diskPath).writeAsBytesSync(bytes, flush: true);
+
+  file.path = '/attachments/${file.attachmentId}';
+  file.storedFileName = storedFileName;
+  file.sha256 = sha256.convert(bytes).toString();
+  file.mimeType = detectedMime;
+  file.width = dimensions.$1;
+  file.height = dimensions.$2;
+  file.sizeBytes = bytes.length;
+  file.status = 'ready';
+  file.errorCode = null;
+  fileBox.put(file);
+}
+
+String _generateAttachmentId() {
+  const alphabet = '0123456789abcdefghijklmnopqrstuvwxyz';
+  final random = Random.secure();
+  String next() {
+    final bytes = List<int>.generate(20, (_) => random.nextInt(256));
+    final sb = StringBuffer();
+    for (final byte in bytes) {
+      sb.write(alphabet[byte % alphabet.length]);
+    }
+    return sb.toString();
+  }
+
+  while (true) {
+    final id = next();
+    final exists = fileBox.query(ChatFile_.attachmentId.equals(id)).build().findFirst();
+    if (exists == null) {
+      return id;
+    }
+  }
+}
+
+bool _isAllowedUsageType(String usageType) {
+  return usageType == 'message' || usageType == 'avatar' || usageType == 'server_icon' || usageType == 'server_banner';
+}
+
+int? _asInt(Object? value) {
+  return switch (value) {
+    int v => v,
+    double v => v.round(),
+    String v => int.tryParse(v),
+    _ => null,
+  };
+}
+
+String _resolveDiskPath(ChatFile file) {
+  final storedFileName = file.storedFileName.trim();
+  if (storedFileName.isNotEmpty) {
+    return '$_uploadsDir${Platform.pathSeparator}$storedFileName';
+  }
+
+  final path = file.path;
+  if (path.startsWith('/uploads/')) {
+    final fileName = path.substring('/uploads/'.length);
+    return '$_uploadsDir${Platform.pathSeparator}$fileName';
+  }
+
+  final attachmentPath = path.startsWith('/attachments/') ? path.substring('/attachments/'.length) : path;
+  return '$_uploadsDir${Platform.pathSeparator}$attachmentPath';
+}
+
+String _normalizeMimeType(String? mimeType) {
+  final cleaned = (mimeType ?? '').split(';').first.trim().toLowerCase();
+  if (cleaned.isEmpty) {
+    return 'application/octet-stream';
+  }
+  return cleaned;
+}
+
+String? _extractBoundary(String? contentTypeHeader) {
+  if (contentTypeHeader == null) {
+    return null;
+  }
+  if (!contentTypeHeader.toLowerCase().startsWith('multipart/form-data')) {
+    return null;
+  }
+  final match = RegExp(
+    r'boundary="?([^\";]+)"?',
+    caseSensitive: false,
+  ).firstMatch(contentTypeHeader);
+  return match?.group(1);
+}
+
+String? _extractFilename(String contentDisposition) {
+  final match = RegExp(
+    r'filename="([^"]+)"',
+    caseSensitive: false,
+  ).firstMatch(contentDisposition);
+  if (match == null) {
+    return null;
+  }
+  final decoded = Uri.decodeFull(match.group(1)!);
+  return decoded.split(RegExp(r'[\\/]')).last;
+}
+
+String _resolveExtension(String? fileName, String mimeType) {
+  final lowerName = fileName?.toLowerCase();
+  if (lowerName != null) {
+    final dotIndex = lowerName.lastIndexOf('.');
+    if (dotIndex > 0 && dotIndex < lowerName.length - 1) {
+      return lowerName.substring(dotIndex);
+    }
+  }
+
+  return switch (mimeType.toLowerCase()) {
+    'image/png' => '.png',
+    'image/jpeg' || 'image/jpg' => '.jpg',
+    'image/gif' => '.gif',
+    'image/webp' => '.webp',
+    'image/avif' => '.avif',
+    'video/mp4' => '.mp4',
+    _ => '.bin',
+  };
+}
+
+(int, int) _extractImageDimensions(Uint8List bytes, String mimeType) {
+  final lowerMime = mimeType.toLowerCase();
+
+  if (lowerMime == 'image/png' && bytes.length >= 24) {
+    final width = _readUint32BigEndian(bytes, 16);
+    final height = _readUint32BigEndian(bytes, 20);
+    return (width, height);
+  }
+
+  if ((lowerMime == 'image/jpeg' || lowerMime == 'image/jpg') && bytes.length > 4) {
+    final jpeg = _extractJpegDimensions(bytes);
+    if (jpeg != null) {
+      return jpeg;
+    }
+  }
+
+  if (lowerMime == 'image/gif' && bytes.length >= 10) {
+    final width = bytes[6] | (bytes[7] << 8);
+    final height = bytes[8] | (bytes[9] << 8);
+    return (width, height);
+  }
+
+  return (0, 0);
+}
+
+int _readUint32BigEndian(Uint8List bytes, int offset) {
+  return (bytes[offset] << 24) | (bytes[offset + 1] << 16) | (bytes[offset + 2] << 8) | bytes[offset + 3];
+}
+
+(int, int)? _extractJpegDimensions(Uint8List bytes) {
+  if (bytes[0] != 0xFF || bytes[1] != 0xD8) {
+    return null;
+  }
+
+  var offset = 2;
+  while (offset + 9 < bytes.length) {
+    if (bytes[offset] != 0xFF) {
+      offset++;
+      continue;
+    }
+
+    final marker = bytes[offset + 1];
+    final hasSize = marker != 0xD8 && marker != 0xD9;
+    if (!hasSize) {
+      offset += 2;
+      continue;
+    }
+
+    if (offset + 4 >= bytes.length) {
+      return null;
+    }
+    final length = (bytes[offset + 2] << 8) | bytes[offset + 3];
+    if (length < 2 || offset + 2 + length > bytes.length) {
+      return null;
+    }
+
+    final isSofMarker = (marker >= 0xC0 && marker <= 0xC3) ||
+        (marker >= 0xC5 && marker <= 0xC7) ||
+        (marker >= 0xC9 && marker <= 0xCB) ||
+        (marker >= 0xCD && marker <= 0xCF);
+    if (isSofMarker && offset + 9 < bytes.length) {
+      final height = (bytes[offset + 5] << 8) | bytes[offset + 6];
+      final width = (bytes[offset + 7] << 8) | bytes[offset + 8];
+      return (width, height);
+    }
+
+    offset += 2 + length;
+  }
+
+  return null;
+}
@@ -1,14 +0,0 @@
-import 'package:chat_server/objectbox.g.dart';
-import 'package:relic/relic.dart';
-
-import '../utils/extensions.dart';
-
-Future<Response> getUsersHandler(Request req) async {
-  final users = userBox.getAll();
-
-  return Response.ok(
-    body: {
-      'users': users.map((u) => {'id': u.id, 'username': u.username, 'createdAt': u.createdAt.toIso8601String()}).toList(),
-    }.toBody,
-  );
-}
@@ -0,0 +1,20 @@
+import 'package:chat_server/models.dart';
+import 'package:chat_server/objectbox.g.dart';
+
+late final Store store;
+late final Box<ChatUser> userBox;
+late final Box<ChatChannel> channelBox;
+late final Box<ChatMessage> messageBox;
+late final Box<ChatMessageMedia> messageMediaBox;
+late final Box<ChatFile> fileBox;
+late final Box<ServerSettings> serverSettingsBox;
+
+void initializeStore() {
+  store = openStore();
+  userBox = store.box<ChatUser>();
+  channelBox = store.box<ChatChannel>();
+  messageBox = store.box<ChatMessage>();
+  messageMediaBox = store.box<ChatMessageMedia>();
+  fileBox = store.box<ChatFile>();
+  serverSettingsBox = store.box<ServerSettings>();
+}
@@ -15,7 +15,7 @@ extension MapToBody on Map<String, dynamic> {
  Body get toBody => Body.fromString(jsonEncode(this));
 }

-extension JsonBody on Body {
+extension BodyHelper on Body {
  /// Creates a JSON body from a Map
  static Body fromJson(Map<String, dynamic> json) {
    return Body.fromString(jsonEncode(json));
@@ -5,10 +5,10 @@ packages:
    dependency: transitive
    description:
      name: _fe_analyzer_shared
-      sha256: "796d97d925add7ffcdf5595f33a2066a6e3cee97971e6dbef09b76b7880fd760"
+      sha256: "0b2f2bd91ba804e53a61d757b986f89f1f9eaed5b11e4b2f5a2468d86d6c9fc7"
      url: "https://pub.dev"
    source: hosted
-    version: "94.0.0"
+    version: "67.0.0"
  adaptive_number:
    dependency: transitive
    description:
@@ -21,10 +21,10 @@ packages:
    dependency: transitive
    description:
      name: analyzer
-      sha256: "9c8ebb304d72c0a0c8764344627529d9503fc83d7d73e43ed727dc532f822e4b"
+      sha256: "37577842a27e4338429a1cbc32679d508836510b056f1eedf0c8d20e39c1383d"
      url: "https://pub.dev"
    source: hosted
-    version: "10.0.2"
+    version: "6.4.1"
  args:
    dependency: transitive
    description:
@@ -33,6 +33,14 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "2.7.0"
+  asn1lib:
+    dependency: transitive
+    description:
+      name: asn1lib
+      sha256: "9a8f69025044eb466b9b60ef3bc3ac99b4dc6c158ae9c56d25eeccf5bc56d024"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.5"
  async:
    dependency: transitive
    description:
@@ -61,18 +69,18 @@ packages:
    dependency: transitive
    description:
      name: build
-      sha256: "275bf6bb2a00a9852c28d4e0b410da1d833a734d57d39d44f94bfc895a484ec3"
+      sha256: "80184af8b6cb3e5c1c4ec6d8544d27711700bc3e6d2efad04238c7b5290889f0"
      url: "https://pub.dev"
    source: hosted
-    version: "4.0.4"
+    version: "2.4.1"
  build_config:
    dependency: transitive
    description:
      name: build_config
-      sha256: "4f64382b97504dc2fcdf487d5aae33418e08b4703fc21249e4db6d804a4d0187"
+      sha256: "4ae2de3e1e67ea270081eaee972e1bd8f027d459f249e0f1186730784c2e7e33"
      url: "https://pub.dev"
    source: hosted
-    version: "1.2.0"
+    version: "1.1.2"
  build_daemon:
    dependency: transitive
    description:
@@ -81,14 +89,30 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "4.1.1"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      sha256: "339086358431fa15d7eca8b6a36e5d783728cf025e559b834f4609a1fcfb7b0a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
  build_runner:
    dependency: "direct dev"
    description:
      name: build_runner
-      sha256: "39ad4ca8a2876779737c60e4228b4bcd35d4352ef7e14e47514093edc012c734"
+      sha256: "028819cfb90051c6b5440c7e574d1896f8037e3c96cf17aaeb054c9311cfbf4d"
      url: "https://pub.dev"
    source: hosted
-    version: "2.11.1"
+    version: "2.4.13"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      sha256: f8126682b87a7282a339b871298cc12009cb67109cfa1614d6436fb0289193e0
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.3.2"
  built_collection:
    dependency: transitive
    description:
@@ -138,7 +162,7 @@ packages:
    source: hosted
    version: "4.11.1"
  collection:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: collection
      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
@@ -162,29 +186,37 @@ packages:
    source: hosted
    version: "1.15.0"
  crypto:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: crypto
      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
      url: "https://pub.dev"
    source: hosted
    version: "3.0.7"
+  crypton:
+    dependency: "direct main"
+    description:
+      name: crypton
+      sha256: "17b6631fbf89e389d421b46629132287ed37d601b2ad1357445826ab85022271"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
  dart_jsonwebtoken:
    dependency: "direct main"
    description:
      name: dart_jsonwebtoken
-      sha256: "0de65691c1d736e9459f22f654ddd6fd8368a271d4e41aa07e53e6301eff5075"
+      sha256: b268ff9bb87a16360a397f1accb50e7c781384e1119010b34f6d7c25820c44d8
      url: "https://pub.dev"
    source: hosted
-    version: "3.3.1"
+    version: "3.1.1"
  dart_style:
    dependency: transitive
    description:
      name: dart_style
-      sha256: "15a7db352c8fc6a4d2bc475ba901c25b39fe7157541da4c16eacce6f8be83e49"
+      sha256: "99e066ce75c89d6b29903d788a7bb9369cf754f7b24bf70bf4b6d6d6b26853b9"
      url: "https://pub.dev"
    source: hosted
-    version: "3.1.5"
+    version: "2.3.6"
  ed25519_edwards:
    dependency: transitive
    description:
@@ -221,17 +253,10 @@ packages:
    dependency: transitive
    description:
      name: flat_buffers
-      sha256: "7c1de2d6eb5f3e61e5c50040841109f509deaaf2b12ec0d57b92456d9ea50345"
+      sha256: "380bdcba5664a718bfd4ea20a45d39e13684f5318fcd8883066a55e21f37f4c3"
      url: "https://pub.dev"
    source: hosted
-    version: "25.9.23"
-  fox_utils2:
-    dependency: "direct main"
-    description:
-      path: "../fox_utils2"
-      relative: true
-    source: path
-    version: "1.0.0"
+    version: "23.5.26"
  frontend_server_client:
    dependency: transitive
    description:
@@ -256,16 +281,8 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "2.3.2"
-  hotreloader:
-    dependency: "direct main"
-    description:
-      name: hotreloader
-      sha256: bc167a1163807b03bada490bfe2df25b0d744df359227880220a5cbd04e5734b
-      url: "https://pub.dev"
-    source: hosted
-    version: "4.3.0"
  http:
-    dependency: "direct dev"
+    dependency: transitive
    description:
      name: http
      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
@@ -296,14 +313,22 @@ packages:
      url: "https://pub.dev"
    source: hosted
    version: "1.0.5"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: "53385261521cc4a0c4658fd0ad07a7d14591cf8fc33abbceae306ddb974888dc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.2"
  json_annotation:
    dependency: transitive
    description:
      name: json_annotation
-      sha256: "805fa86df56383000f640384b282ce0cb8431f1a7a2396de92fb66186d8c57df"
+      sha256: cb09e7dac6210041fad964ed7fbee004f14258b4eca4040f72d1234062ace4c8
      url: "https://pub.dev"
    source: hosted
-    version: "4.10.0"
+    version: "4.11.0"
  lints:
    dependency: "direct dev"
    description:
@@ -324,10 +349,10 @@ packages:
    dependency: transitive
    description:
      name: matcher
-      sha256: "12956d0ad8390bbcc63ca2e1469c0619946ccb52809807067a7020d57e647aa6"
+      sha256: dc58c723c3c24bf8d3e2d3ad3f2f9d7bd9cf43ec6feaa64181775e60190153f2
      url: "https://pub.dev"
    source: hosted
-    version: "0.12.18"
+    version: "0.12.17"
  meta:
    dependency: transitive
    description:
@@ -337,7 +362,7 @@ packages:
    source: hosted
    version: "1.18.1"
  mime:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: mime
      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
@@ -356,18 +381,18 @@ packages:
    dependency: "direct main"
    description:
      name: objectbox
-      sha256: ac1e1ef852f60ea0af01fddb28811c8aa169f2b1ae9284e91e7b822abe5ed603
+      sha256: "3d1cb5f9aa564f95c76ba251299f6cb1591c3dd8ff05fd76fa0549d899d9fe31"
      url: "https://pub.dev"
    source: hosted
-    version: "5.2.0"
+    version: "4.1.0"
  objectbox_generator:
    dependency: "direct dev"
    description:
      name: objectbox_generator
-      sha256: "28628fa65d4fe8ade868cd50aa323ecdfd6d435fcda2cc7484071b84031f8c5e"
+      sha256: "777924e14daf18603a023b346333acac1c4fce9fe4a715b85d98cfcc723d9a1a"
      url: "https://pub.dev"
    source: hosted
-    version: "5.2.0"
+    version: "4.1.0"
  package_config:
    dependency: transitive
    description:
@@ -388,10 +413,10 @@ packages:
    dependency: transitive
    description:
      name: pointycastle
-      sha256: "92aa3841d083cc4b0f4709b5c74fd6409a3e6ba833ffc7dc6a8fee096366acf5"
+      sha256: "4be0097fcf3fd3e8449e53730c631200ebc7b88016acecab2b0da2f0149222fe"
      url: "https://pub.dev"
    source: hosted
-    version: "4.0.0"
+    version: "3.9.1"
  pool:
    dependency: transitive
    description:
@@ -468,18 +493,18 @@ packages:
    dependency: transitive
    description:
      name: shelf_web_socket
-      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      sha256: cc36c297b52866d203dbf9332263c94becc2fe0ceaa9681d07b6ef9807023b67
      url: "https://pub.dev"
    source: hosted
-    version: "3.0.0"
+    version: "2.0.1"
  source_gen:
    dependency: transitive
    description:
      name: source_gen
-      sha256: "1d562a3c1f713904ebbed50d2760217fd8a51ca170ac4b05b0db490699dbac17"
+      sha256: "14658ba5f669685cd3d63701d01b31ea748310f7ab854e471962670abcf57832"
      url: "https://pub.dev"
    source: hosted
-    version: "4.2.0"
+    version: "1.5.0"
  source_map_stack_trace:
    dependency: transitive
    description:
@@ -548,26 +573,34 @@ packages:
    dependency: "direct dev"
    description:
      name: test
-      sha256: "54c516bbb7cee2754d327ad4fca637f78abfc3cbcc5ace83b3eda117e42cd71a"
+      sha256: "75906bf273541b676716d1ca7627a17e4c4070a3a16272b7a3dc7da3b9f3f6b7"
      url: "https://pub.dev"
    source: hosted
-    version: "1.29.0"
+    version: "1.26.3"
  test_api:
    dependency: transitive
    description:
      name: test_api
-      sha256: "93167629bfc610f71560ab9312acdda4959de4df6fac7492c89ff0d3886f6636"
+      sha256: ab2726c1a94d3176a45960b6234466ec367179b87dd74f1611adb1f3b5fb9d55
      url: "https://pub.dev"
    source: hosted
-    version: "0.7.9"
+    version: "0.7.7"
  test_core:
    dependency: transitive
    description:
      name: test_core
-      sha256: "394f07d21f0f2255ec9e3989f21e54d3c7dc0e6e9dbce160e5a9c1a6be0e2943"
+      sha256: "0cc24b5ff94b38d2ae73e1eb43cc302b77964fbf67abad1e296025b78deb53d0"
      url: "https://pub.dev"
    source: hosted
-    version: "0.6.15"
+    version: "0.6.12"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      sha256: "62ee18aca144e4a9f29d212f5a4c6a053be252b895ab14b5821996cff4ed90fe"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.2"
  typed_data:
    dependency: transitive
    description:
@@ -625,7 +658,7 @@ packages:
    source: hosted
    version: "1.2.1"
  yaml:
-    dependency: transitive
+    dependency: "direct main"
    description:
      name: yaml
      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
@@ -633,4 +666,4 @@ packages:
    source: hosted
    version: "3.1.3"
 sdks:
-  dart: ">=3.11.0-296.5.beta <4.0.0"
+  dart: ">=3.9.0 <4.0.0"
@@ -1,23 +1,23 @@
 name: chat_server
-description: A server app using the shelf package and Docker.
-version: 1.0.0
-# repository: https://github.com/my_org/my_repo
+description: A self-hosted chat server with home server identity model.
+version: 0.1.0

 environment:
-  sdk: ^3.11.0-296.5.beta
+  sdk: ">=3.0.0 <4.0.0"

 dependencies:
  relic:
-  hotreloader:
+  objectbox:
  dart_jsonwebtoken:
  bcrypt:
-  objectbox:
-  fox_utils2:
-    path: ../fox_utils2
+  crypton:
+  crypto:
+  collection:
+  yaml:
+  mime:

 dev_dependencies:
+  test:
  objectbox_generator:
  build_runner:
-  http:
  lints:
-  test:
@@ -0,0 +1,61 @@
+import 'package:chat_server/src/handlers/auth_handlers.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('normalizeHomeServer', () {
+    test('normalizes host without scheme', () {
+      expect(
+        normalizeHomeServer('chat.example.com'),
+        'https://chat.example.com',
+      );
+      expect(
+        normalizeHomeServer('localhost:9870'),
+        'http://localhost:9870',
+      );
+    });
+
+    test('strips trailing slash/path/query/fragment', () {
+      expect(
+        normalizeHomeServer('https://example.com/a/b?x=1#y'),
+        'https://example.com',
+      );
+      expect(
+        normalizeHomeServer('https://example.com/'),
+        'https://example.com',
+      );
+    });
+
+    test('returns null for invalid input', () {
+      expect(normalizeHomeServer(''), isNull);
+      expect(normalizeHomeServer('://bad'), isNull);
+    });
+  });
+
+  group('defaultSchemeForHost', () {
+    test('returns http for localhost-style hosts', () {
+      expect(defaultSchemeForHost('localhost:9870'), 'http');
+      expect(defaultSchemeForHost('127.0.0.1:9870'), 'http');
+      expect(defaultSchemeForHost('[::1]:9870'), 'http');
+    });
+
+    test('returns https for non-local hosts', () {
+      expect(defaultSchemeForHost('chat.example.com'), 'https');
+    });
+  });
+
+  group('toUserHandle', () {
+    test('uses URL host and port', () {
+      expect(
+        toUserHandle('alice', 'https://chat.example.com:8443'),
+        '@alice@chat.example.com:8443',
+      );
+    });
+
+    test('falls back to raw home server string', () {
+      expect(
+        toUserHandle('alice', 'chat.example.com'),
+        '@alice@chat.example.com',
+      );
+    });
+  });
+}
@@ -0,0 +1,42 @@
+import 'package:chat_server/src/auth/crypto_service.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('AuthService password hashing', () {
+    test('hash + verify works', () {
+      const password = 'pass1234';
+      final hash = AuthService.hashPassword(password);
+
+      expect(hash, isNotEmpty);
+      expect(AuthService.verifyPassword(password, hash), isTrue);
+      expect(AuthService.verifyPassword('wrong-password', hash), isFalse);
+    });
+  });
+
+  group('CryptoService signing', () {
+    test('signatures verify with matching keypair', () {
+      final keyPair = CryptoService.generateKeyPair();
+      const payload = 'alice@localhost:9870:1700000000';
+
+      final signature = CryptoService.sign(payload, keyPair.privateKey);
+      final ok = CryptoService.verify(payload, signature, keyPair.publicKey);
+
+      expect(ok, isTrue);
+    });
+
+    test('signature fails for modified payload', () {
+      final keyPair = CryptoService.generateKeyPair();
+      const payload = 'payload-a';
+      const tamperedPayload = 'payload-b';
+
+      final signature = CryptoService.sign(payload, keyPair.privateKey);
+      final ok = CryptoService.verify(
+        tamperedPayload,
+        signature,
+        keyPair.publicKey,
+      );
+
+      expect(ok, isFalse);
+    });
+  });
+}
@@ -0,0 +1,326 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+import 'dart:math';
+
+import 'package:chat_server/config/config.dart';
+import 'package:chat_server/server.dart';
+import 'package:chat_server/src/state/app_state.dart';
+import 'package:test/test.dart';
+
+void main() {
+  final repoDir = Directory.current.path;
+  final configPath = '$repoDir${Platform.pathSeparator}config.yaml';
+  final objectboxDir = '$repoDir${Platform.pathSeparator}objectbox';
+  final uploadsDir = '$repoDir${Platform.pathSeparator}uploads';
+
+  late String originalConfig;
+  late Uri baseUri;
+  final random = Random();
+
+  Future<void> waitUntilServerReady(Uri uri) async {
+    final client = HttpClient();
+    try {
+      for (var i = 0; i < 120; i++) {
+        try {
+          final req = await client.getUrl(uri.resolve('/.well-known/server'));
+          final res = await req.close();
+          if (res.statusCode == 200) {
+            await res.drain();
+            return;
+          }
+          await res.drain();
+        } catch (_) {}
+        await Future<void>.delayed(const Duration(milliseconds: 250));
+      }
+      fail('Server did not become ready in time.');
+    } finally {
+      client.close(force: true);
+    }
+  }
+
+  setUpAll(() async {
+    originalConfig = File(configPath).existsSync() ? File(configPath).readAsStringSync() : '';
+
+    final bindPort = 12000 + random.nextInt(2000);
+    final testConfig = '''
+server:
+  name: "Reliquary Test Server"
+  bind_host: "127.0.0.1"
+  bind_port: $bindPort
+  public_base_url: "http://127.0.0.1:$bindPort"
+  configured: true
+  first_setup: true
+  bootstrap_admin_limit: 2
+  dev_db_tools: true
+
+security:
+  jwt_secret: "integration_test_secret_1234567890"
+''';
+    File(configPath).writeAsStringSync(testConfig);
+    baseUri = Uri.parse('http://127.0.0.1:$bindPort');
+
+    final dataMdb = File('$objectboxDir${Platform.pathSeparator}data.mdb');
+    final lockMdb = File('$objectboxDir${Platform.pathSeparator}lock.mdb');
+    if (dataMdb.existsSync()) {
+      dataMdb.deleteSync();
+    }
+    if (lockMdb.existsSync()) {
+      lockMdb.deleteSync();
+    }
+    final uploads = Directory(uploadsDir);
+    if (uploads.existsSync()) {
+      for (final entity in uploads.listSync()) {
+        if (entity is File) {
+          entity.deleteSync();
+        }
+      }
+    }
+
+    Config.initialize();
+    initializeStore();
+    unawaited(startServer());
+    await waitUntilServerReady(baseUri);
+  });
+
+  tearDownAll(() async {
+    await stopServer();
+    if (originalConfig.isEmpty) {
+      File(configPath).deleteSync();
+    } else {
+      File(configPath).writeAsStringSync(originalConfig);
+    }
+  });
+
+  test('auth + upload + component messages + gallery index', () async {
+    final client = HttpClient();
+    try {
+      Future<Map<String, dynamic>> postJson(
+        String path,
+        Map<String, dynamic> body, {
+        String? token,
+      }) async {
+        final req = await client.postUrl(baseUri.resolve(path));
+        req.headers.set(HttpHeaders.contentTypeHeader, 'application/json');
+        if (token != null) {
+          req.headers.set(HttpHeaders.authorizationHeader, 'Bearer $token');
+        }
+        req.write(jsonEncode(body));
+        final res = await req.close();
+        final text = await utf8.decodeStream(res);
+        expect(res.statusCode, anyOf(200, 201), reason: '$path -> $text');
+        return jsonDecode(text) as Map<String, dynamic>;
+      }
+
+      Future<Map<String, dynamic>> getJson(
+        String path, {
+        String? token,
+      }) async {
+        final req = await client.getUrl(baseUri.resolve(path));
+        if (token != null) {
+          req.headers.set(HttpHeaders.authorizationHeader, 'Bearer $token');
+        }
+        final res = await req.close();
+        final text = await utf8.decodeStream(res);
+        expect(res.statusCode, 200, reason: '$path -> $text');
+        return jsonDecode(text) as Map<String, dynamic>;
+      }
+
+      Future<Map<String, dynamic>> uploadFile(
+        String filePath, {
+        required String token,
+      }) async {
+        final file = File(filePath);
+        expect(file.existsSync(), isTrue, reason: 'Missing test asset: $filePath');
+        final bytes = file.readAsBytesSync();
+        final rawFileName = file.uri.pathSegments.last;
+        final safeFileName = rawFileName.replaceAll(RegExp(r'[^a-zA-Z0-9._-]'), '_');
+        final lower = rawFileName.toLowerCase();
+        final contentType = lower.endsWith('.mp4')
+            ? 'video/mp4'
+            : lower.endsWith('.png')
+                ? 'image/png'
+                : lower.endsWith('.jpg') || lower.endsWith('.jpeg')
+                    ? 'image/jpeg'
+                    : lower.endsWith('.gif')
+                        ? 'image/gif'
+                        : 'application/octet-stream';
+        final boundary = '----reliquary-test-boundary';
+        final req = await client.postUrl(baseUri.resolve('/api/uploads'));
+        req.headers.set(HttpHeaders.authorizationHeader, 'Bearer $token');
+        req.headers.set(
+          HttpHeaders.contentTypeHeader,
+          'multipart/form-data; boundary=$boundary',
+        );
+        req.write('--$boundary\r\n');
+        req.write(
+          'Content-Disposition: form-data; name="file"; filename="$safeFileName"\r\n',
+        );
+        req.write('Content-Type: $contentType\r\n\r\n');
+        req.add(bytes);
+        req.write('\r\n--$boundary--\r\n');
+        final res = await req.close();
+        final text = await utf8.decodeStream(res);
+        expect(res.statusCode, 200, reason: '/api/uploads -> $text');
+        return jsonDecode(text) as Map<String, dynamic>;
+      }
+
+      final register = await postJson('/auth/register', {
+        'username': 'alice',
+        'password': 'password123',
+      });
+      final token = register['token'] as String;
+
+      final channel = await postJson(
+        '/api/channels',
+        {'name': 'integration-channel', 'description': 'integration'},
+        token: token,
+      );
+      final channelId = channel['id'] as int;
+
+      final uploadedPng = await uploadFile(
+        '$repoDir${Platform.pathSeparator}scripts${Platform.pathSeparator}media${Platform.pathSeparator}Untitled-1.png',
+        token: token,
+      );
+      final pngAttachmentId = uploadedPng['attachmentId'] as String;
+
+      final uploadedPsd = await uploadFile(
+        '$repoDir${Platform.pathSeparator}scripts${Platform.pathSeparator}media${Platform.pathSeparator}ftnr-symbol.psd',
+        token: token,
+      );
+      final psdAttachmentId = uploadedPsd['attachmentId'] as String;
+      expect(psdAttachmentId, isNotEmpty);
+
+      final uploadedMp4 = await uploadFile(
+        '$repoDir${Platform.pathSeparator}scripts${Platform.pathSeparator}media${Platform.pathSeparator}Zelsus： Enemy Within [jUKjVrDFUug].mp4',
+        token: token,
+      );
+      final mp4AttachmentId = uploadedMp4['attachmentId'] as String;
+      expect(mp4AttachmentId, isNotEmpty);
+
+      final localMessage = await postJson(
+        '/api/messages',
+        {
+          'channelId': channelId,
+          'components': [
+            {
+              'id': 'cmp_local_gallery',
+              'type': 'gallery',
+              'typeVersion': 1,
+              'fallback': 'Local upload gallery',
+              'data': {
+                'items': [
+                  {
+                    'id': 'itm_local_1',
+                    'source': 'local_upload',
+                    'attachmentId': pngAttachmentId,
+                  }
+                ]
+              }
+            }
+          ]
+        },
+        token: token,
+      );
+      expect(localMessage['componentsJson'], contains('"source":"local_upload"'));
+      expect(localMessage['componentsJson'], contains('"status":"ready"'));
+
+      final fileAndVideoMessage = await postJson(
+        '/api/messages',
+        {
+          'channelId': channelId,
+          'components': [
+            {
+              'id': 'cmp_files',
+              'type': 'gallery',
+              'typeVersion': 1,
+              'fallback': 'Local file + local video + external file link',
+              'data': {
+                'items': [
+                  {
+                    'id': 'itm_psd',
+                    'source': 'local_upload',
+                    'attachmentId': psdAttachmentId,
+                    'caption': 'PSD unsupported preview candidate'
+                  },
+                  {'id': 'itm_mp4', 'source': 'local_upload', 'attachmentId': mp4AttachmentId, 'caption': 'MP4 playback candidate'},
+                  {
+                    'id': 'itm_ext_file',
+                    'source': 'external_url',
+                    'url': 'https://example.com/assets/archive.zip',
+                    'mimeType': 'application/zip',
+                    'originalFileName': 'archive.zip'
+                  }
+                ]
+              }
+            }
+          ]
+        },
+        token: token,
+      );
+      expect(fileAndVideoMessage['componentsJson'], contains('"itm_psd"'));
+      expect(fileAndVideoMessage['componentsJson'], contains('"itm_mp4"'));
+      expect(fileAndVideoMessage['componentsJson'], contains('"external_url"'));
+
+      final externalMessage = await postJson(
+        '/api/messages',
+        {
+          'channelId': channelId,
+          'components': [
+            {
+              'id': 'cmp_external_gallery',
+              'type': 'gallery',
+              'typeVersion': 1,
+              'fallback': 'External gallery',
+              'data': {
+                'items': [
+                  {
+                    'id': 'itm_ext_1',
+                    'source': 'external_url',
+                    'url': 'https://pbs.twimg.com/media/HCI8WPKaYAAKhkj?format=jpg&name=medium',
+                    'mimeType': 'image/jpeg',
+                    'originalFileName': 'HCI8WPKaYAAKhkj.jpg',
+                  },
+                  {
+                    'id': 'itm_ext_2',
+                    'source': 'external_url',
+                    'url': 'https://pbs.twimg.com/media/HCKAMLxaUAAhYJS?format=jpg&name=medium',
+                    'mimeType': 'image/jpeg',
+                    'originalFileName': 'HCKAMLxaUAAhYJS.jpg',
+                  }
+                ]
+              }
+            }
+          ]
+        },
+        token: token,
+      );
+      expect(externalMessage['componentsJson'], contains('"source":"external_url"'));
+      expect(externalMessage['componentsJson'], contains('"status":"ready"'));
+
+      final messages = await getJson('/api/messages?channelId=$channelId&limit=10', token: token);
+      final messageList = (messages['messages'] as List).cast<Map<String, dynamic>>();
+      expect(messageList.length, greaterThanOrEqualTo(2));
+
+      final media = await getJson('/api/channels/$channelId/media?limit=10', token: token);
+      final mediaItems = (media['media'] as List).cast<Map<String, dynamic>>();
+      expect(mediaItems.length, greaterThanOrEqualTo(6));
+
+      final hasExternal = mediaItems.any((m) => (m['externalUrl'] as String?)?.contains('pbs.twimg.com/media/HCI8WPKaYAAKhkj') == true);
+      final hasPngLocal = mediaItems.any((m) => (m['attachmentId'] as String?) == pngAttachmentId);
+      final hasPsdLocal = mediaItems.any((m) => (m['attachmentId'] as String?) == psdAttachmentId);
+      final hasMp4Local = mediaItems.any((m) => (m['attachmentId'] as String?) == mp4AttachmentId);
+      final hasExternalFile = mediaItems.any((m) => (m['externalUrl'] as String?) == 'https://example.com/assets/archive.zip');
+      final hasVideoKind = mediaItems.any((m) => (m['attachmentId'] as String?) == mp4AttachmentId && m['kind'] == 'video');
+
+      expect(hasExternal, isTrue);
+      expect(hasPngLocal, isTrue);
+      expect(hasPsdLocal, isTrue);
+      expect(hasMp4Local, isTrue);
+      expect(hasExternalFile, isTrue);
+      expect(hasVideoKind, isTrue);
+    } finally {
+      client.close(force: true);
+    }
+  });
+}
@@ -1,39 +0,0 @@
-import 'dart:io';
-
-import 'package:http/http.dart';
-import 'package:test/test.dart';
-
-void main() {
-  final port = '8080';
-  final host = 'http://0.0.0.0:$port';
-  late Process p;
-
-  setUp(() async {
-    p = await Process.start(
-      'dart',
-      ['run', 'bin/server.dart'],
-      environment: {'PORT': port},
-    );
-    // Wait for server to start and print to stdout.
-    await p.stdout.first;
-  });
-
-  tearDown(() => p.kill());
-
-  test('Root', () async {
-    final response = await get(Uri.parse('$host/'));
-    expect(response.statusCode, 200);
-    expect(response.body, 'Hello, World!\n');
-  });
-
-  test('Echo', () async {
-    final response = await get(Uri.parse('$host/echo/hello'));
-    expect(response.statusCode, 200);
-    expect(response.body, 'hello\n');
-  });
-
-  test('404', () async {
-    final response = await get(Uri.parse('$host/foobar'));
-    expect(response.statusCode, 404);
-  });
-}
Author	SHA1	Message	Date
Foxyz	01c110bbe1	Major architecture update: stable identity, component validation, media indexing, and protocol docs	2026-02-27 19:33:35 +03:00
Foxyz	ce7c97d13a	Add baseline unit tests and fix home server normalization	2026-02-20 17:45:10 +03:00
Foxyz	a93d619b4c	Implement components + uploads flow and gateway-aligned payloads	2026-02-20 17:41:08 +03:00
Foxyz	458be6f991	Revised ARCHITECTURE.md based on CLIENT_INTEGRATION.md, to match the current implementation	2026-02-20 16:37:30 +03:00
Foxyz	2222e2af4a	Updated ARCHITECTURE.md with new and refined ideas	2026-02-20 15:01:55 +03:00
Foxyz	ccf966ffc1	Add gateway realtime fanout and cursor pagination docs	2026-02-20 04:24:27 +03:00
Foxyz	4399eafc90	Align architecture doc with current crypto implementation	2026-02-20 03:50:56 +03:00
Foxyz	3f7d50f6a2	Document realtime gateway and notifications/push architecture	2026-02-20 03:50:31 +03:00
Foxyz	f6b27565cd	Implement chat server auth, models, handlers, and docs context	2026-02-20 03:44:02 +03:00
Foxyz	23602efd5f	Harden join auth flow and sync project baseline	2026-02-20 03:43:50 +03:00
Z User	6a8977c4c3	feat: Initial MVP with home server identity model - User model with Ed25519 keypair identity - Register/login on home server (creates keypair) - Join guest servers with signature verification - Public endpoints for cross-server identity - Channel and message CRUD - JWT authentication middleware Architecture: Home server model, no federation, client-driven sync	2026-02-19 23:29:52 +00:00